Ross: Uh, excuse me. Evolution is not for you to buy, Phoebe. Evolution is scientific fact, like, like, like the air we breathe, like gravity.
Phoebe: Ok, don't get me started on gravity.
Ross: You uh, you don't believe in gravity?
Phoebe: Well, it's not so much that you know, like I don't believe in it, you know, it's just...I don't know, lately I get the feeling that I'm not so much being pulled down as I am being pushed.
(There's a knock on the door.)
Chandler: Uh-Oh. It's Isaac Newton, and he's pissed.