(Chandler, Monica, Phoebe and Joey are leaving…)
Rachel Green (to Joey): Hit the lights, please.
(Ross comes out of the restroom to a dark room)
Ross Geller: How long was I in there?
Rachel Green: I’m just cleaning up.
Ross Geller: Oh, you need any help?
Rachel Green: Okay, sure. Thanks.
From Friends – Season 1 Episode 2: ‘The One with the Sonogram at the End’ (1×02)