Annie Hall
Who couldn’t relate to dating troubles? There was a moment when Annie (Diane Keaton) said to Alby (Woody Allen), “You never want to try anything new.” Then, they get offered some cocaine and something totally unexpected to the audience and film crew alike happened. Alby (Allen) sneezes after inspecting it and the powder flies everywhere. Woody Allen accidentally sneezed but the crew and cast could not stop laughing!
Annie Hall
The Departed
Next up, this unscripted moment was invented by Jack Nicholson. During The Departed, he played Frank Costello. Remember when Frank sits with Billy Costigan (Leonardo DiCaprio)? Seemingly out of nowhere, we see Frank whip out a gun, pointing it at Billy. Of course, Billy reacts with complete surprise. Well, most of this surprise came because Nicholson didn’t tell DiCaprio ahead of him that he came up with this addition.
The Departed