from the movie "The Big Restaurant"(1966)
(original title: Le grand Restaurant)

Originally in the script, it is only the German accent with which Septime (Louis de Funès) should speak which should make people laugh, but, after the shooting of the scene, Louis de Funès wasn't satisfied. The next day, after a sleepless night, he finally had the idea that would change the scene dramatically. "That's it, I found it! Here it is: what if a shadow drew a mustache and Hitler's haircut while I revealed the recipe in German? " The gag was shot in a single take and could be made thanks to a set of mirrors. The scene thus has become one of the most striking in the film.