Hal: I can't stand thinking there's somebody out there who doesn't like me.
Nick: You messed up. It's not going to help you if you keep dwelling on it.
Hal: Oh, you're going to talk to me about dwelling?
Nick: That's totally different.
Hal: Exactly, 'kay, I'm pondering why a particular woman didn't sleep with me a couple of weeks ago, and you're still agonizing over some girl you slept with once, months ago. Now, that makes me philosophical, and you... neurotic.