getupngo said: "even better is when the clip won't go in for idina/Kristin and they are both laughing hysterically"
I would love to see this! Do you have it?
As for the one's I've seen live, Christopher Fitzgerald in Waitress skipped a line or messed it up, which caused him to laugh while reciting his poem to Dawn in the beginning of Act 2. He covered it up well by following up his laughter with, "It's a lot, it's a lot... Uh-huh, YES!"
Recently I saw Beetlejuice and during Day-O, Leslie's dress didn't clip on to the pig. After spinning, she ducked behind a chair at the dinner table and frantically started unraveling her dress.