Ross: (about Rachel attending a lecture with Mark) Well, I'm sorry, but, uh, look... If you're not working with him anymore, why do you have to still do stuff with him?
Rachel: Because, he's my friend.
Ross: Okay, but do you really need another friend? I mean...
Rachel: Okay, well if I stop playing with Joey and Chandler, can I play with Mark?
Ross: Is that funny? Am I supposed to be laughing?
Ross: I don't know, you thought "See you Saturday" was funny.