I like the scene where Snoopy is mocking Lucy during her rant. Cracks me up everytime, especially when he jumps up on her head and mimics a vulture for no reason. What can I say?
My wife's favorite part is when all the kids start dancing for no apparent reason in the middle of Charlie Brown's rant on directing. Every kid has a different dance and each one is goofy. She cracks up every time at that scene!