Action: Several boys repeatedly blowing up balloons until they break.
Boy 2: What are they doing?
Boy 1: Blowing up balloons.
Boy 2: Why?
Boy 1: It's a contest.
Boy 2: Oh. What does the winner get?
Boy 1: Nothing
Boy 2: What does the loser get, then?
Boy 1: He gets to buy more balloons!