The doctor is so out, he's in, man.

Q: So, you're a brain surgeon?
A: Yes, I do.
Q: Uh, so you do brain surgery?
A: Yes, I am.
Q: Well, whichever is correct. Where do you practice?
A: I don't practice, man. I got it down pat.
Q: I mean, where do you operate?
A: Out of my kitchen.
Q: You do brain surgery in your kitchen!!??!
A: Cool it, man, I ain't got no license.
Q: I imagine not. What do you do for a living?
A: I play trumpet in Detroit for Jimmy Lunsford.
Q: Jimmy Lunsford's dead.
A: He is? I'm gonna have to quit bugging that cat for a raise.
Q: So what else do you do?
A: I play trumpet for Jimmy Lunsford in Chicago.
Q: I just told you, Jimmy Lunsford's dead!
A: There, too?