There were two job openings in 2001, McQueary said, lending to the possibility that the event took place that year.
He conceded he could have gotten it wrong to investigators "I'm not a perfect person," he admitted but sternly dismissed any suspicion toward his credibility as "semantics" and "word play."
At one point, Rominger's cross led to questions of whether McQueary saw actual penetration.
Looking to presiding Senior Judge John M. Cleland for assurance before moving forward, and echoing his testimony that he avoids graphic descriptions in the presence of respected figures, McQueary admitted he never saw a penis make penetration.
But, in support of his interpretation of what was going on, McQueary offered a parallel.
He described a dimly lit bedroom in a Penn State fraternity house where, in this hypothetical, McQueary walks in to hear slapping sounds and observes two people on top of one another.
Obviously, all signs point to sex, the witness said.
In the alleged 2001 incident in the Lasch building locker room, he had even more indications of sexual activity, he said.
"The lights were fully on. They were naked. They were in a severely sexual position," he said.
Thomas R. Kline, who represents one of the alleged victims, said in an interview after the day's proceedings that McQueary was in the "top 1 percent" of witnesses he had ever seen.