Frasier: [waving to a man across the street] I'm listening!
Niles: Here's a tip for you. The ones with cameras are tourists. They have no idea who you are, much less why you're listening.
Frasier: Oh, Niles, don't be so churlish. The man clearly waved to me first.
Niles: He didn't wave at you.
Frasier: Yes he did.
Niles: He was probably waving-
Frasier: I don't know why you're even objecting-
Niles: He was waving for a cab to get away from the scary listening man.