10 Famous Movie Scenes That Came From On-Set Issues

Love him or hate him, there's no denying that Annie Hall is Woody Allen's masterpiece. A complex film about neuroticism, the subjectivity of love, and Jewish cultural perception, Allen still found ways to make it lighthearted and funny. It had Christopher Walken calmly discussing the call of the void and nothing funnier has ever been put to celluloid.

In one scene, Alvy and Annie are at a gathering of friends and he is cajoled into doing cocaine because he "never tries anything new." In order to familiarize himself with the drug before sampling it himself, he asks his friend how much blow typically costs while he leans over a small pan of it. Just after hearing how expensive it is, he sneezes into the pan and blows a cloud of cocaine into the air.

The scene is all the funnier because it wasn't supposed to happen. While on set, Allen was having an allergic reaction to the fake cocaine that films are required to use per union rules. He accidentally sneezed directly into the powder and sent it directly into another actor's face, causing Diane Keaton to break character because she found it so funny. So did the initial test audiences and Allen even had to re-edit the scene because laughter from the gag had drowned out the following few minutes of the film.