I had always wondered about the line "Screw your courage to the sticking place" in Disney's Beauty and the Beast's "Mob Song." Where exactly is the sticking place for our courage? Who knew it had to be screwed in?
Today I was reading Macbeth and came across the line. Lady Macbeth says it while she's persuading Macbeth to go through with Duncan's murder in Act I, Scene 7.
I was all excited about my discovery, but it's already on IMDB's trivia page, which I've read before but hadn't remembered everything. Those IMDB guys don't miss a thing. So, I'm not posting anything revolutionary here, but it's more exciting when you find something out yourself rather than read it on a list of trivia.