Quote from Ross in The One with Ross and Monica's Cousin
Cassie: Thanks for letting me stay here. Monica's place was nice. But her fiance sure stares a lot. [Ross stares at Cassie as she flips her hair] Oh, my God! You do a great Chandler! Ross: Uh-huh. Yeah, I have a knack for impressions. Cassie: Well, maybe after we get re-acquainted you could do me. Ross: Yeah. No!