Phoebe Buffay: I just don’t buy it.

Ross Geller: Excuse me. Evolution is not for you to buy, Phoebe. Evolution is scientific fact, like the air we breathe… like gravity.

Phoebe Buffay: Okay, don’t get me started on gravity.

From Friends – Season 2 Episode 3: ‘The One Where Heckles Dies’ (2×03) | Produced by NBC