Movie Trivia

Q: What's the name of the THX sound?
A: Deep Note [offical site] [listen]

Q: How often does Humphrey Bogart say "Play it again Sam." in Casablanca?
A: Never. Not once. He says a lot of things that are close to it but never those exact words. Don't believe me? Go back and watch it again.

The Untouchables (1987)
Kevin Costner pays a visit to Sean Connery. As they talk and the camera cuts between them, watch Connery's top button. It alternates between being buttoned and unbuttoned, back and forth.