J. SKELLY WRIGHT, Circuit Judge:

At approximately 9:15 A.M. on January 17, 1970 a Ford Thunderbird owned and operated by William Stewart was proceeding south on Interstate Route 95 in North Carolina. In the car were three passengers, Norman Rich, William Cathey, and Ricco Hightower, members of Stewart's band which had performed the previous evening, finishing at 2:00 A.M. and returning to their hotel at about 2:30 or 2:45 A.M. The band members arose at 7:30 A.M. and left at 8:00 A.M. en route to their next engagement. The remainder of Stewart's band was traveling in a Ford Econoline van following immediately behind Stewart's car. While approaching a bridge across the Neuces River, Stewart's car left the highway, ran along the median strip at a slight angle to the highway, struck the bridge curbing, and plunged into the river, killing all four men instantly. The car had been purchased only 12 days before and had been driven only 1,400 miles before the accident occurred.

Plaintiffs, representatives of the decedents, filed separate actions against Ford Motor Company, manufacturer of the Thunderbird, and Steuart Motor Company, seller of the vehicle, alleging that the accident was caused by "a defect in the steering mechanism or brake construction" of the vehicle in breach of the seller's and manufacturer's express and implied warranties. Following extensive discovery, the four actions were consolidated for trial. Four trials were held; the first three resulted in mistrials and the fourth in a verdict for defendant Ford Motor Company from which the plaintiffs appeal. Because the jury instructions given were improper, we feel it necessary to reverse and remand for yet another trial.

I. EVIDENCE PRESENTED

A. Plaintiffs' Evidence

Plaintiffs called four witnesses on the issue of liability — the highway patrolman who investigated the accident, an occupant of the Ford Econoline named Benny Deer, and two expert witnesses who examined the Thunderbird after the accident.

Trooper H. M. Bullock of the North Carolina Highway Patrol arrived at the scene at about 9:30 A.M. He testified that Interstate Route 95 in the area of the accident is a four-lane highway with two paved 22-foot-wide roadways separated by a 40-foot-wide median. Bullock stated that on the morning of the accident the median strip was even with the highway at the place where they met, sloped slightly toward the center for drainage, was covered with grass "two or three inches high," and was wet with dew. Where the vehicle left the pavement there was a small spot of six or eight inches of sand, and the officer could see the tire marks "as the car rolled across the sand." The officer found no other marks in the sand or on the highway before the point where Stewart's car left the road. From the tire tracks Bullock could ascertain that the Thunderbird left the paved section of the highway at a slight angle and traveled on the median grass strip a distance of 61 feet before the brakes were applied. Prior to application of the brakes the tires simply "left an impact in the grass." After the brakes were applied "the grass was torn up, where the wheels had slid, were dragging across the grass. It had uprooted the grass and had torn the grass up loose from the ground, leaving slide marks." From the point where the brakes were applied the slide marks continued on the grass median a distance of 89 feet six inches in a straight line, at the same angle to the paved highway, and ended at an eight-inch-high concrete curb or abutment between the two bridges approximately 13 feet from the edge of the southbound lane of the roadway. After striking the abutment the vehicle continued through the air for a distance of 110 feet and came to rest against a concrete bridge support 20 feet after striking the ground. On direct examination Bullock estimated the speed of the vehicle as approximately 60 miles an hour when it left the highway. On cross-examination he testified that it was going "at least 60 miles an hour."

Stewart was a diabetic. As a result of tests ordered by Bullock, reports were read into the record showing that Stewart's diabetic condition was under control and not related to the accident, and that no evidence of drugs or alcohol was found in Stewart's body. Bullock further testified that he found no drugs or alcohol in the Stewart vehicle.

Benny Deer, the drummer in the Stewart band, was riding in the Ford Econoline van which was following the Thunderbird. He testified that he was sitting in the seat directly behind the driver of the van and that he and the driver were the only occupants of the van who were awake. Deer observed the Thunderbird moving from the right lane of the highway to the left lane to pass another car. He testified that looking from his seat in the van, through the rear window of the Thunderbird, he could see Stewart "wrestling" with the steering wheel and Rich, the right front seat passenger in the Thunderbird, reaching over in an attempt to assist Stewart in steering the car. On direct examination Deer testified that the van was approximately three car lengths behind the Thunderbird. On cross-examination it developed that the van could have been either 60 feet or 180 to 200 feet in back of the Stewart car.

Professor Samuel S. Aidlin, who was qualified as an expert in the field of mechanical engineering, testified that a crate containing the front end of Stewart's Thunderbird was shipped to him with the request by plaintiffs' counsel that he make an examination to determine the cause of the accident. Aidlin stated that in his laboratory the wrecked front end was pried apart "layer after layer." When Aidlin reached the steering mechanism he noticed that there was a broken tie rod connecting sleeve. Aidlin then supervised the taking of metallurgical tests of the tie rod sleeves to ascertain the cause of the break. He testified that the test indicated that the sleeve was manufactured without any defects and was of the proper hardness range. He stated, however, that in threading the sleeve "one of the threads came very close to the edge of the outer surface." It was Aidlin's opinion that the cause of the accident was a fatigue failure of the adjusting sleeve which caused Stewart to lose control of the Thunderbird and which prevented Stewart from correcting its course.

On cross-examination Aidlin was questioned concerning the speed of the vehicle and the amount of time it traveled on the median strip before striking the bridge abutment. Aidlin stated that a vehicle traveling 60 miles per hour would travel the 150 feet in about 1.4 seconds and that the normal reaction time for a driver to begin taking corrective action was .75 second.

Sydney H. Avner, after qualifying as a metallurgist, testified regarding tests he had performed at Aidlin's request. In his opinion the type of fracture in the left tie rod adjusting sleeve of the Stewart vehicle was a fatigue fracture and not an impact break, the fatigue failure caused by "the sharp corner at the bottom of the thread. It was a typical stress raiser."

B. Defendant's Evidence

Defendant called four expert witnesses on the cause of the accident. Calvin Cummings, a Ford quality control engineer and metallurgist, testified that electron microscopy of the fractured tie rod sleeve indicated that the cause of the fracture was impact rather than stress. He stated that the sleeve was bent and the fracture uneven — typical characteristics of an impact fracture. He stated that typical fatigue fractures, unlike the Stewart tie rod sleeve, are clean and the severed pieces will fit back together perfectly. Cummings explained the results of simulated testing performed under his direction. A tie rod assembly, of the same type as on the Stewart vehicle, had been exposed to severe stress on a factory simulator. Although other parts of the assembly broke, the connecting sleeve remained intact. Then an excessively deep thread was placed in the connecting sleeve at the point where the Stewart connecting sleeve fractured. When this altered sleeve was placed on the simulator again no failure occurred. Cummings testified that the only time he was able to get a connecting sleeve to break was when he cut the sleeve using a hacksaw.

Cummings described tests he had conducted at the Ford proving ground using a 1970 Thunderbird, similar to the Stewart car, which had been purchased on the open market. During the tests the Thunderbird was driven at 60 miles an hour and the left tie rod connecting sleeve was severed by means of a wire running under the dashboard. The driver of the vehicle was able to bring the car to a controlled stop. The Thunderbird was then driven through an automobile handling course with the tie rod disconnected. The driver was able to control the car through the course. Then the Thunderbird was subjected to a skidding test on grass with the sleeve disconnected. The resulting skid was different from that of the Stewart vehicle in that the left front wheel skewed sideways in the grass and produced a skid track much wider than that of the right wheel and the back end swung out during the skid leaving a different set of tracks. When the tie rod was severed the sleeve ground along the highway leaving a visible abrasion on the sleeve. Cummings indicated that a similar abrasion should have been found on the Stewart tie rod sleeve and a corresponding one on the highway where the accident occurred. From these tests Cummings concluded that the tie rod on Stewart's vehicle had not caused the accident.

Cummings also described two demonstrations he had performed with the Thunderbird. In one a tie rod connecting sleeve with an enlarged thread was installed. The car was driven over various surfaces for a distance of 2,000 miles. At the conclusion of the test the tie rod was intact. In another demonstration the Thunderbird was driven ahead of a 1969 Ford van of the type in which Benny Deer had been riding. At distances of both 60 feet and 180 feet both the driver of the vehicle and the right front seat passenger simulated wrestling with the steering wheel. Nothing could be seen from the van about the actions of the men inside the car.

John Redinger, a metallurgist for the company which manufactured the tie rod assembly, explained how the adjusting sleeves were manufactured and threaded. He testified that it was impossible for one thread to be cut deeper than its adjacent threads with the tapping machines utilized by the manufacturer. Redinger also testified concerning the simulated testing he had done with Cummings. Redinger stated that in his 35 years of experience, except for the hacksawed tie rod assembly, he had never seen an adjusting sleeve fail due to fatigue.

Defendant then called Dr. Lucius Walker, Professor of Mechanical Engineering at Howard University, and Dr. Richard Eisenberg, Associate Professor of Metallurgy at the University of Rochester. Both men had conducted metallurgical examinations of the Stewart tie rod conducting sleeve and testified that there was no evidence of fatigue failure. Both had also been involved in the test track demonstrations described by Cummings. They confirmed Cummings' description of the testing and his conclusion that a disconnected tie rod did not cause the vehicle to go out of control on dry pavement and that on grass the test car exhibited characteristics different from those indicated by the Stewart vehicle's skid marks.

In the test to determine whether an occupant of the van could see the movements of the driver and occupant of the Thunderbird Professor Eisenberg rode in the van in the same position as Deer. He testified that at both 60 feet and 180 feet all that could be seen from the van through the rear window of the Thunderbird was "some motion in the front seat of the Thunderbird." He could not discern any attempted turning or manipulation of the steering wheel by the driver or any type of action of the right front passenger. He could not detect what was going on, and all he could see of the inside of the Thunderbird was the back of the bucket seats.

II. REFUSAL TO GIVE REQUESTED JURY INSTRUCTIONS

In seeking reversal of the verdict for appellee, appellants allege that various errors were committed by the trial judge. We consider here only appellants' contention that the trial court erred in refusing to give the following two requested instructions:

Plaintiffs' Prayer for Instruction No. 2

In determining whether or not either or both defendants breached the express warranty that the Thunderbird was free from defects, or that it was of merchantable quality and fit for the purpose for which it was intended, you are instructed that plaintiffs need not prove a specific defect. It is sufficient, if you find from the evidence that the motor vehicle in question went out of control, causing the accident, as a result of some mechanical failure due to an obvious or hidden defect in the car which existed at the time it left Ford Motor Company.

The law does not require plaintiffs to prove the mechanical failure by specific physical evidence, nor does it require plaintiffs to prove exactly what part of the car was defective, as plaintiffs may prove the mechanical failure solely by circumstantial evidence.

Plaintiffs' Prayer for Instruction No. 4

If you determine, after considering all of the evidence, direct and circumstantial, that the accident which took the lives of Billy Stewart, Norman Rich, and William Cathey, would not have occurred in the ordinary course of things but for the existence of a defect in the vehicle operated by decedent Billy Stewart, then you can infer that the cause of the accident arose from a defect in the manufacture or distribution of the vehicle.

Appellants' Appendix at 1.

In assessing appellants' contentions three factors must be considered. They are, in brief, (1) whether the proffered jury instructions accurately reflect the law in the District of Columbia; (2) whether there was sufficient evidence in the record to establish a prima facie case under the proffered instructions; and (3) whether appellants waived the basis for liability on the part of appellee sought to be made in the proffered instructions by failing to comply with Rule 52, Fed.R.Civ.P., or by presenting their case primarily in terms of proof of a specific defect.

A. The Requested Instructions as a Statement of Applicable Law

The threshold issue before this court is the determination of which jurisdiction's law should govern. Recovery is sought for an accident occurring in North Carolina allegedly caused by a defect present at the time of sale in the District of Columbia. This case is here because it was commenced prior to reorganization of the District of Columbia court system and we sit, therefore, as a court of the District of Columbia. Under the District's choice-of-law rules it seems well settled that, given the facts of this case, District of Columbia law would govern both substantively and procedurally. See McCrossin v. Hicks Chevrolet, Inc., 248 A.2d 917, 921 (D.C.App. 1964) (holding that District law seeks to protect persons who purchase in the District and that this interest is stronger than that of any competing jurisdiction in the products liability claim). See also Gilper v. Kiamesha Concord, Inc., 302 A.2d 740, 744 (D.C.App. 1973) (issue of sufficiency of the evidence to establish negligence claim is procedural in the District of Columbia and accordingly is governed by the law of the forum); Miller Long Co. v. Shaw, 204 A.2d 697, 701 (D.C.App. 1964), overruled on another point, Myers v. Gaither, 232 A.2d 577 (D.C.App. 1967), remanded, 131 U.S.App.D.C. 216, 404 F.2d 216 (1968) ( res ipsa loquitur, being a rule of evidence, is procedural and is governed by the law of the District of Columbia); Powers v. Coates, 203 A.2d 425, 427-428 (D.C.App. 1964) (same); Hutchins v. Rock Creek Ginger Ale Co., 194 A.2d 305, 306 (D.C.App. 1963) (same).

It is undisputed by the parties that the District of Columbia does recognize strict liability for manufacturers and intermediate sellers who place on the market defective merchandise which later injures a consumer. Brief for appellee at 33; see McCrossin v. Hicks Chevrolet, Inc., supra, 248 A.2d at 919-920. See also Simpson v. Logan Motor Co., 192 A.2d 122, 123 (D.C. Mun.App. 1963); Automobile Ins. Co. v. Williams, 111 A.2d 874, 876 (D.C.Mun.App. 1955). It also appears undisputed that circumstantial evidence is admissible to prove the existence of a defect. See McCrossin v. Hicks Chevrolet, Inc., supra.

In holding that the existence of a defect may be proved by circumstantial evidence, however, courts in other jurisdictions have indicated that the burden remains on the plaintiff to present evidence on two closely related points. First, plaintiff must present evidence which would tend to negate causes for an accident other than a defect in the product. See Lindsay v. McDonnell Douglas Aircraft Corp., 460 F.2d 631, 640 (8th Cir.), on remand, 352 F. Supp. 633 (E.D.Mo. 1972), aff'd, 485 F.2d 1288 (8th Cir. 1973); Franks v. National Dairy Products Corp., 414 F.2d 682, 684 (5th Cir. 1969); Bollmeier v. Ford Motor Co., 130 Ill.App.2d 844, 265 N.E.2d 212, 217 (1970). Second, plaintiff must present proof which would suggest that whatever defect might have existed was one introduced into the product by the defendant. See, e.g. Lindsay v. McDonnell Douglas Aircraft Corp., supra, 460 F.2d at 637; Greco v. Bucciconi Engineering Co., 407 F.2d 87, 91 (3d Cir. 1969); Elmore v. American Motors Corp., 70 Cal.2d 578, 75 Cal.Rptr. 652, 451 P.2d 84, 87 (1969) ( en banc); Shramek v. General Motors Corp., 69 Ill.App.2d 72, 216 N.E.2d 244, 247-249 (1966); Wojciuk v. United States Rubber Co., 19 Wis.2d 224, 120 N.W.2d 47, 52 (1963).

The quantum of proof that must be adduced to meet these two specific requirements is not great. For example, in Franks v. National Dairy Products Corp., supra, the plaintiff offered only his own testimony that he had followed the manufacturer's instructions and ordinary care in handling grease that subsequently exploded. 414 F.2d at 685. Similarly, in the automobile accident case which was the subject of Bollmeier v. Ford Motor Co., supra, the plaintiff testified only that he had had nothing to drink and that his speed was not excessive at the time of the accident. 265 N.E.2d at 213. An inference that a defect was in a product at the time it entered the stream of commerce has apparently been allowed from proof that a product was new, see e.g., Greco v. Bucciconi Engineering Co., supra, 407 F.2d at 91, although many cases do involve conflicting evidence from which a jury could identify a specific defect which could only have resulted from manufacturer error. See, e.g., Elmore v. American Motors Corp., supra, 75 Cal.Rptr. 652, 451 P.2d at 87. See also Lindsay v. McDonnell Douglas Aircraft Corp., supra, 460 F.2d at 637 (evidence that "aircraft was substantially in the same condition at the time of crash as when it was delivered by McDonnell to the Navy"). Moreover, the burden on the plaintiff is only to negate those causes not in the control of the defendant which might reasonably have led to the accident. In identifying the causes plaintiff must negate, courts have usually required proof rebutting only the most obvious causes (such as drinking or excessive speed in automobile accident cases, see Bollmeier v. Ford Motor Co., supra), unless the defendant has suggested some specific theories of how the accident might have happened without a defect being present, cf. Franks v. National Dairy Products Corp., supra; Dealers Transport Co. v. Battery Distributing Co., 402 S.W.2d 441, 445 (Ky.Ct.App. 1966). And courts have refused to allow a case to go to the jury only in the most egregious instances of failure of proof on these two points. See, e.g., Shramek v. General Motors Corp., supra, 216 N.E.2d at 248-249 (insufficient evidence when plaintiff made no proof that a tire with 10,000 miles on it had not been abused or subjected to road conditions which could have led to a blowout).

Before turning to the question whether plaintiffs here adduced sufficient evidence to go to the jury under the proffered instructions, we must consider whether those instructions accurately state the law set out above. We have no doubt that the instructions are generally consistent with the circumstantial evidence theory of proof as accepted by the courts in the District of Columbia. Williams v. Steuart Motor Co., 161 U.S.App.D.C. 155, 494 F.2d 1074, 1080 (1974); McCrossin v. Hicks Chevrolet, Inc., supra, 248 A.2d at 219-220. We also think that some duty to negate other causes is fairly implicit in Plaintiffs' Prayer for Instruction No. 4 which states: "If you determine * * * that the accident which took the [life] of Billy Stewart * * would not have occurred in the ordinary course of things but for the existence of a defect in the vehicle operated by decedent * * *." (Emphasis added.) Further, Plaintiff's Prayer for Instruction No. 2, which would have been read in conjunction with Instruction No. 4, expressly states the jury must find a "mechanical failure due to an obvious or hidden defect in the car which existed at the time it left Ford Motor Company." (Emphasis added.)

We note that the circumstantial evidence test advanced by plaintiffs in their requested instructions has the same procedural effect as the doctrine of res ipsa loquitur that has developed in the District of Columbia. Under District law res ipsa simply allows a case to go to the jury; it raises no presumptions and it does not shift the burden of proof. See Powers v. Coates, supra, 203 A.2d at 427-428. We think, therefore, that plaintiffs' theory should similarly be treated as "a procedural rule of evidence and not a rule of pleading." Id. As such, there was no need in the instruction to identify the rule of evidence by name as long as its possible application to the facts developed at trial, as the jury found them, was clearly and accurately set out. We also note that remarkably similar instructions have been specifically approved in products liability cases in other jurisdictions. See Dennis v. Ford Motor Co., 332 F. Supp. 901, 903 (W.D.Pa. 1971), aff'd, 471 F.2d 733, 735 (3d Cir. 1973); Moraca v. Ford Motor Co., 132 N.J.Super. 117, 332 A.2d 600, 610 (1974), aff'd, 66 N.J. 454, 332 A.2d 599 (1975), noted, 5 Seton Hall L.Rev. 190 (1975). In both Dennis and Moraca, as well as in Chestnut v. Ford Motor Co., 445 F.2d 967, 971 (4th Cir. 1971), the courts also held that the plaintiffs were entitled to the general instructions they sought despite the fact that their efforts during trial were devoted to proving the existence of specific defects. Finally, we think the jury can be credited with knowing that "in the ordinary course of things" cars go off the road for any number of reasons, principally the negligence of the driver. Since defendant has not suggested any theory for the accident that would be outside the ken of a jury, we think it unlikely that a jury charged with the proffered instructions would be oblivious to the plainly apparent competing causes for the Stewart automobile's leaving the road.

B. The Sufficiency of the Evidence

We now turn to the question whether plaintiffs presented sufficient evidence to make a prima facie case under the proffered instructions. The Supreme Court of Hawaii has suggested that if an accident completely destroyed car and driver, so that no defect could be shown, recovery might "be allowed anyway as a carefully driven vehicle does not leave the road in the absence of a defect in the car." Stewart v. Budget Rent-a-Car Corp., 52 Haw. 71, 470 P.2d 240, 244 n. 5 (1970). We need not go so far. The testimony of plaintiffs' witness Benny Deer supports the conclusion that something had gone wrong with the steering system. The fact that the car traveled 150 feet in a straight line before leaving the ground also supports that conclusion, since it would be reasonable to expect the driver of a responsive car to attempt to turn it away from the edge of the road. In addition, plaintiffs presented ample evidence to negate likely accident causes other than a vehicle malfunction. The driver was not drunk, drugged, or suffering a diabetic reaction. Since the brakes took effect in less than a second after he left the pavement, we can infer that he had not fallen asleep. The car was not speeding; road conditions were good; and there had not been a sudden blowout. This evidence compares quite favorably with evidence which other courts have found sufficient. See, e.g., Chestnut v. Ford Motor Co., supra, 445 F.2d at 971; Moraca v. Ford Motor Co., supra; Henningsen v. Bloomfield Motors, Inc., 32 N.J. 358, 161 A.2d 69 (1960); Annot., 51 A.L.R.3d 8, 31-36 (1973). Plaintiffs were entitled to ask the jury to infer that the accident was caused by some unknown defect which caused the steering system to malfunction.

Plaintiffs were also entitled to ask the jury to conclude that the defect was attributable to the manufacturer. (Responsibility of the manufacturer for any defect plaintiffs proved was apparently not contested below.) The extreme newness of the car is itself sufficient basis for an inference that any failure in the steering system was caused by a defect for which the manufacturer was responsible. See, e.g., Henningsen v. Bloomfield Motors, Inc., supra (steering system failure in 10-day-old car); Annot., 54 A.L.R.3d 1079, 1090 (1973). See also Automobile Ins. Co. v. Williams, supra, 111 A.2d at 876. Moreover, there was no evidence that the car had been altered in any way during the 12 days Stewart owned it.

C. Whether Appellants are Barred on Appeal from Claiming Trial Court Error in Refusing to Give the Requested Instructions

Appellee argues that, regardless of whether the requested instructions accurately stated the law, appellants — for two distinct reasons — cannot now complain of the trial court's refusal to give these instructions. Appellee contends, first, that appellants have not complied with Rule 51, Fed.R.Civ.P., and, second, that the attempt to prove that a specific defect ( i.e., the fatigue failure of the left front tie rod adjusting sleeve) foreclosed submission of the case to the jury on a more general theory such as that contained in the requested instructions. We disagree with appellee on both points.

1. Rule 51

Rule 51 provides, in relevant part:

No party may assign as error the giving or the failure to give an instruction unless he objects thereto before the jury retires to consider its verdict, stating distinctly the matter to which he objects and the grounds of his objection. * * *

Appellee contends that appellants did not object to the trial court's refusal to give Instructions Nos. 2 and 4 and that, under Rule 52, appellants cannot assign this refusal as error.

Appellee's argument, however, rests on a misconception of the meaning of this rule. As courts and commentators have recognized, Rule 51 is to be read together with Rule 46, Fed.R.Civ.P., which states:

Formal exceptions to rulings or orders of the court are unnecessary; but for all purposes for which an exception has heretofore been necessary it is sufficient that a party, at the time the ruling or order of the court is made or sought, makes known to the court the action which he desires the court to take or his objection to the action of the court and his grounds therefor * * *.

In order to preserve for appeal an objection to a jury instruction, thus, it is not necessary for a party to except or object "if the party's position has previously been clearly made to the court and it is plain that a further objection would be unavailing." 9 C. Wright A. Miller, Federal Practice and Procedure § 2553 at 639-640 (1971) (footnote omitted).

This was precisely the situation before the trial court in the instant case. Plaintiffs specifically requested that Instructions Nos. 2 and 4 be given. Instead the judge denied both. On the basis of the record below, it appears plain that this denial represented the trial judge's final opinion that these two instructions should not be given and that further objection by plaintiffs would have been not only unavailing but wasteful of the court's time. To hold that appellants are now precluded from complaining of the trial court's refusal to give these instructions would be an unnecessary elevation of form over substance.

Under similar circumstances other appellate courts have repeatedly reached the same conclusion. As the Seventh Circuit stated in Irvin Jacobs Co. v. Fidelity Deposit Co. of Maryland, 202 F.2d 794, 800-801 (7th Cir. 1953): "Rule 46 * * * provides that formal exceptions to rulings or orders of the court are unnecessary. Under Rule 51, the objection is sufficient so long as the trial judge understands plaintiff's position." On the same issue the Third Circuit has held: "Counsel must make his points clearly so that the trial judge may see what they are and if he believes they are right, follow them. But he is not required to indulge in reiterative insistence in order to preserve his client's rights." Moreau v. Pennsylvania R. Co., 166 F.2d 543, 545 (3d Cir. 1948). Another case, directly on point, is Mumma v. Reading Co., 247 F. Supp. 252 (E.D.Pa. 1965), in which the court considered a motion to modify judgment following a jury verdict in a Federal Employers' Liability Act suit. The defendant contended that the plaintiff was foreclosed from raising the particular issue in question — whether there was evidence of contributory negligence — "because of [the plaintiff's] alleged failure to comply with F.R.Civ.P. 51." Id. at 259. Rejecting the defendant's contention, the court held that the plaintiff's requested instruction "was sufficient to call plaintiff's position to the attention of the trial judge * * * and `reiterative insistence' was not required [ quoting Moreau v. Pennsylvania R. Co., supra]. The substantive spirit of F.R. Civ.P. 51 was adequately satisfied." Id.

Appellee cites only two federal decisions to support the assertion that, in the face of appellants' failure to comply literally with Rule 51, "this Court is rendered powerless to review" the trial judge's failure to give Instructions 2 and 4. Brief for appellee at 34. The first case cited, Hoagland v. Chestnut Farms Dairy, Inc., 63 App.D.C. 357, 72 F.2d 729 (1934), was decided before the Federal Rules of Civil Procedure were adopted, and the second, Villaroman v. United States, 87 U.S.App.D.C. 240, 184 F.2d 261 (1950), was a criminal case in which this court's remarks on Rule 30, Fed.R.Crim.P. (the criminal procedure counterpart of Rule 51, Fed.R.Civ.P.; see 2 C. Wright, Federal Practice and Procedure § 481 at 275 (1969)) were dicta.

2. Reliance on a General Theory

Neither are we persuaded by appellee's second argument as to why we should uphold denial of the requested instructions. In fact, appellee fails to cite a single authority to support its proposition that appellants' effort to prove a specific defect foreclosed submission of the case to the jury on a more general theory. Rather, the applicable precedents show that, at least in the District of Columbia, a case may be submitted to the jury on the alternative grounds of a specific defect and res ipsa loquitur. Because the instant case involves use of circumstantial evidence, and since res ipsa loquitur is but a specialized use of circumstantial evidence, it is appropriate to look at this well developed body of law.

Although the District of Columbia did, at one time, prohibit a plaintiff from trying to rely on both specific defects or acts and res ipsa loquitur, the irrationality of the rule was criticized and it was abandoned. The cases first rejecting the former position held that the doctrine only becomes inapplicable "when the circumstances have been so completely elucidated that no inference of defendant's liability can reasonably be made." Loketch v. Capital Transit Co., 101 U.S.App.D.C. 287, 248 F.2d 609, 610 (1957). See also Lustine-Nicholson Motor Co. v. Petzal, 106 U.S.App.D.C. 18, 268 F.2d 893, 894, 83 A.L.R.2d 738 (1959). So long as "the true cause [of the accident] is still left in doubt or is not clearly shown," introduction of some evidence to show cause would not serve to foreclose a res ipsa instruction. Lindsey v. D.C. Transit Co., 140 A.2d 306, 308-309 (D.C.App. 1958). More recent cases do not qualify the principle; they seem to allow a plaintiff to rely on both res ipsa and proof of specific acts under all circumstances. Powers v. Coates, supra, 203 A.2d at 427-428 (dicta); Levy v. D.C. Transit System, Inc., 174 A.2d 731, 733 (D.C.App. 1961); Honey v. George Hyman Construction Co., 63 F.R.D. 443, 451 (D.D.C. 1974). Whether or not the rule is as broad as recent cases suggest, plaintiffs' case falls within its narrowest compass and therefore merited the requested instructions.

Certainly the rule represents sound policy. As recognized by the Second Circuit, to hold otherwise would penalize the plaintiff who probes deeply into the defendant's behavior. Future plaintiffs "would hesitate to introduce whatever evidence they might have available as to the cause of injury for fear that thereby they would be deprived of an otherwise appropriate [circumstantial evidence] charge." Citrola v. Eastern Air Lines, 264 F.2d 815, 817 (2d Cir. 1959), quoting from Lobel v. American Air Lines, 192 F.2d 217, 219-220 (2d Cir. 1951).

The trial court's refusal to give the requested instructions was error. Accordingly, the case is

Reversed and remanded.