Biggs, Maris and Van Dusen, Circuit Judges.
The Shubers, John and Joanne, husband and wife, citizens of Pennsylvania, sued S. S. Kresge Company (Kresge), a Michigan corporation qualified to do business in Pennsylvania, because Mrs. Shuber was injured when a light fixture fell upon her on December 8, 1965 while she was working for F. & G. Merchandising, Inc. (F. & G.), which was operating for its own account the "Auto Department" in a store operated by Kresge. Mrs. Shuber sought damages for her injuries and Mr. Shuber sought to recover his wife's medical expenses and for loss of her services. Kresge, as a third-party plaintiff, joined Kirby Electric Service, Inc. (Kirby), Crown Construction Company (Crown), and F. & G. as third-party defendants, all three corporations being incorporated in the Commonwealth of Pennsylvania. There are statements in the deposition of Zappala, president of Versailles Development Corporation (Versailles), that Versailles was the landlord of the building, that Versailles' lease*fn1 was with Kresge as tenant, that the K-Mart Store was operated by Kresge, that the "Auto Department" was operated independently of Kresge by F. & G. as a concessionaire. Zappala also testified that Crown was the general contractor for Versailles, that Kirby did some electrical work perhaps in the area where Mrs. Shuber was injured. The relation of Kirby to Versailles and to Kresge is far from clear.*fn2
Under the rules of the United States District Court for the Western District of Pennsylvania in effect at all times with which we are concerned, a plaintiff is required to give a narrative written statement of the facts that will be offered by him to prove his case "by oral or documentary evidence" at trial and also the names and addresses of all witnesses he expects to call.*fn3 The Shubers' theory of recovery was clearly set up in the complaint and in their first pretrial narrative statement. It was that Kresge had been negligent in installing or having installed the light fixture which fell and injured Mrs. Shuber. As to witnesses to testify on the issue of liability the Shubers' first pretrial narrative statement filed March 1, 1967 included one designated as "Plaintiff." There were, of course, two plaintiffs and the Shubers' counsel attributes his use of the word "Plaintiff" to a typographical error, an "s" having been omitted. Shubers' counsel has not yet made clear which plaintiff was omitted and which one was indicated by the word "Plaintiff." There was no suggestion in the pretrial narrative statement that Mr. Shuber, an electrician by trade, was to testify respecting the lighting fixture which fell on his wife. In the Shubers' Supplemental Pretrial Statement, filed December 2, 1969, no additional liability witness was designated.*fn4
At the trial*fn5 Mrs. Shuber testified that she heard a loud noise like a heavy box being dropped above her and the lighting fixture fell. Mr. McKernan testified to the same effect. There was evidence that a room above the room in which Mrs. Shuber and McKernan were at the time of the accident was a storeroom where battery cables and various other items relating to the business of F. & G. were stored, and that there was generally a stock clerk in that storeroom, which seems to have been occupied only by employees of F. & G. Mrs. Shuber testified, as did McKernan, that this was not an uncommon happening and Mrs. Shuber said she had complained about it. Only one more witness was called by the Shubers who corroborated the occurrence of the accident. The Shubers then rested. The defective nature of the lighting fixture's fastenings was proved but there was not sufficient evidence to connect Kresge with the deficiency. Kresge moved for a directed verdict on this ground. The Court granted the motion, stating inter alia, "Throughout the pleading, discovery and pretrial stages of this case, the case proceeded on the contention that the fixture was installed by Kirby Electric Service, as a subcontractor to Crown Construction Company. The allegations of the pleadings, pretrial narratives, and the plaintiff's evidence of liability at trial were all pointed to the contention that Kresge failed in its duty to discover the defective ceiling fastening. In the view of the Court the evidence produced by plaintiff[s] failed to reveal that Kresge could have discovered the defendant [ sic ] . . . [defect] on reasonable inspection, or that such inspection was required of it.
"When Plaintiff[s] closed . . . [their] evidence on liability at trial, Defendant [Kresge] moved for a directed verdict. After argument on this point Plaintiff[s]' counsel moved for leave to reopen to call an additional witness not previously listed on Plaintiff[s]' pretrial statement. Plaintiff[s]' offer was to produce an officer of the Versailles Development Corporation, a real estate development and holding enterprise, which owned the title to the land and constructed the building for Kresge according to Kresge's plans and specifications. The purpose of the offer of this evidence was to show that the method of fastening the fixture to the ceiling was specified by Kresge on its plans and that because the space above the ceiling was used by Kresge as a warehouse, causing jarring and vibration of the floor and underlying ceiling, a different type of fastening should have been used. The witness to be called would identify these plans and specifications.
"The Court withheld determination of the motion and continued the trial until the next day, allowing Plaintiff[s] to procure this witness.
"The following day, before taking any evidence, the plaintiff[s]' counsel announced that he also intended to call husband-plaintiff to testify that when Kresge took possession of the building from the contractor, the ceiling in the sublet portion of the premises where plaintiff was injured was in an unfinished state. It was offered that he would testify that Kresge itself installed the ceiling tiles and in the process disconnected the lighting fixtures, and then reinstalled them, in the process of which the attachment was made to the insubstantial ceiling tiles rather than the underlying solid joists. The husband-plaintiff was also an electrician and it was offered that he would testify that the defective installation would be apparent on reasonable inspection.
"Defendant objected that it had no prior notice that husband-plaintiff would be called as a liability witness. In the wife-plaintiff's deposition she had testified that her husband had no knowledge of the facts of the accident. It was also pointed out that husband-plaintiff had been present throughout the trial and plaintiff[s]' counsel had rested on the issue of liability without calling him.
"On this argument, and in the interest of enforcing the Pretrial Rules of this Court, Defendant's Motion for Directed Verdict was granted. Plaintiff[s]' counsel was attempting to change completely the theory of liability under which the case was prepared, discovery employed, pretrial procedures conducted, and under which it was presented up until the moment that plaintiff[s] rested, and defendant moved to dismiss. Husband-plaintiff sat through the trial proceedings up to this point and there was never any suggestion that he had any evidence of a different kind to offer.
"We have two questions here on Plaintiff[s]' Motion for relief; (1) Was the evidence produced sufficient to raise a question of fact that the defect could have been discovered by Kresge by reasonable inspection and that the circumstances required such inspection as would have revealed the defect; and (2) should the plaintiff[s] have been allowed to reopen . . . [their] . . . case to introduce an entirely new theory of liability, that Kresge itself was responsible for the insecure fastening?
"On the first question we are convinced that Plaintiff[s]' evidence was insufficient.
"As to the second question it should certainly have been prejudicial to Defendant to allow the introduction of this entirely new evidence. Kresge had no notice that it would be charged as the party which installed the insecure fastening. Its joinder of Crown Construction Company and Kirby Electric Service was made on the basis that the contractors had installed the fixture, ...