Frasier: Niles, it's a day spa!
Niles: [deep voice:] Good gravy, this is fantastic!
Frasier: Would you stop talking like that? That's the worst impersonation of Cam Winston I've ever heard.
Niles: You've heard another one?
Frasier: Well, of course not.
Niles: Then it's the best.
Frasier: Now you're stuck talking like that all day.