Quote from Phoebe in The One with the Pediatrician
Phoebe: Well, is anything you told me about yourself true? My name is Mike. And I do play piano. Phoebe: Oh, uh-huh. Prove it. Mike: There isn't a piano here. Phoebe: That wouldn't stand in the way of a true pianist. Mike: Okay. [Mike stands up and mimes playing piano] Phoebe: You are really good.