The scene from the movie Shrek where Gingy is being tortured by Lord Farquaad always makes me laugh:
Gingy: "NO! Not the buttons! Not my gumdrop BUTTONS... Ok, I'll tell you... Do you know the Muffin Man?"
Lord Farquaad: "The Muffin Man?"
Gingy: "The Muffin Man."
Lord Farquaad: "Yes, I know the Muffin Man... Who lives on Drury Lane?"