Robin Hood: Prince of Thieves - Damn, I'm in the Shot
In the courtyard battle near the end of the film, Robin and Azeem are about to use the catapult to get over the wall. As a few of the men begin to push it into position there is a shot taken from on the catapult looking at the men. If you look at the wall behind them there is a window, and in that window is a man in a sweater and pair of jeans realizing he has wandered into the shot. How on earth this made it into the final cut I will never know.
vhs or dvd