Quote from Frasier in The Friend
Bob: Knock knock, Roz. Frasier around? Roz: You just missed him. Bob: Too bad. I got great news. I checked out that vacancy in his apartment building and guess who's gonna be neighbors? [Frasier squeals from the floor of Roz's booth] Bob: What was that? Roz: Feedback. This equipment's old and pathetic.