Buster is the youngest of Michael's siblings. He suffers from frequent panic attacks and spends most of his time with his mother. He enjoys scholarly pursuits, although he has had to cut back taking classes when his father went to jail.

Buster: I have been apart of this archeological dig. I think we found a part of a pterodactyl under Fashion Island.
[Flashback to the dig; Buster slams the hammer down on a human skull, breaking it]
Buster: Oh... Tha--That was 90% gravity.

Michael: You were flying today, buddy.
Buster: Yes, I was flying. But a little too close to the sun.
Lucille: You let him go into the sun!?

Buster: This is going to be the most bitchingly fast bike in all of Orange County.

Lucille: Buster!
Buster: [Running around the apartment] It's a bird!
Lucille: I know it's a bird--I'm on the phone!
Buster: It walked on my pillow!

Buster: Hey, brother.