Brick: What are you doing?
Axl: I'm gonna shoot a tennis ball out of a tailpipe into my sweet spot tomorrow. Got to protect the twins. Ah. Eh. Got to be careful down there. Got my gene pool to think about. Got to balance out the circus freaks you and Sue are gonna produce, 'cause even if you two do marry non-circus freaks, the circus-freak gene, as you know, is dominant.
Brick: If the circus-freak gene were dominant, you'd be one, also. We come from the same parents.
Axl: Wow. Sounds like the nerd gene is dominant, too.
Brick: Actually, if the nerd gene were dominant...
Axl: No one wants a science lesson now, Brick!