Jerry: What's with all the peanut butter George?
George: I'm increasing my lung capacity, Jerry! I told Susanne [a party clown] I could blow up a hundred balloons in 10 minutes and now she wants me to help her at a kids party!
Jerry: A kids party! George, you don't know anything about kids!
later...
Elaine: What happened to Susanne, George?
George: Oh, that's over.
Jerry: What? Why?
George: I sneezed peanut butter all over a kid...
Elaine: Ohhh...
George: ...he was allergic. His face puffed right up!
Jerry: Like a balloon?
George: LIKE A BALLOON!