78/52: Hitchcock's Shower Scene. Dir. Alexandre O. Philippe. 2017
I did not know that before Psycho was released in 1960, movie audiences were in the habit of coming and going throughout a film. Since Hitchcock kills off one of his films' leads early on in the picture (and perhaps to market intrigue), he required that no one would be seated once the movie had begun to be certain viewers wouldn't miss the film's most memorable scene.
As someone who has always been annoyed by vagabond theater audiences, I was fascinated to learn that. Even though it's probably just about the most mundane thing you can take away from 78/52, which is filled with lots more interesting facts and analysis.
It's a documentary about a movie scene everyone knows — even people who have never seen it.