That's where Leroy Blevins Sr proposed that the shooter was - just inside the pergola behind Zapruder firing from the 3rd 'window'.
But that window is high and it needed somebody to lift the shooter possibly?
It would account for Zapruder saying the shot came over his shoulder.
Zapruder never says the shot came from over his shoulder. He assumes the shot came from behind him because that's where the police seem to rush to after the shooting.
Marylin Sitzman, stood next to Zapruder, describes the shots as being quiet and coming from the direction of the TSBD building.
Neither of them support a shot being heard directly behind them and the idea that the assassin is being held up by someone else is like something out of a Marx Brothers routine.
