Izzie: George says you have Burke's scrub cap.
Cristina: So?
Izzie: Give it to him.
Cristina: No..
Izzie: Give it to him, christina!
Cristina: What is with you?
Izzie: He needs it to operate.
Cristina: No he doesn't.
Izzie: But it isn't your decision to make. Not when he's going in on Denny. Now are you going to give it to him, or am I going to have to physically take it from you?
Cristina: (laughing) Are you threatning me?
Izzie: I swear to god, Christina. I like you, I really do. But I grew up in a trailerpark, and I am not above kicking your pampered little Beverly-Hills ass. And I do mean physically kicking. Your ass.

Izzie: This is over.
Alex: What, you're breaking up with me over a corpse?
Izzie: No, no. I am breaking up with you because on your very best day, that corpse is twice the man you will ever be. You're not good enough for me, Alex. You're not good enough for anyone.

Alex: O'Malley... you're a sad excuse for a man.
George: Excuse me?
Alex: I know you heard me. You're like a whiny little girl.
Meredith: Alex?
Alex: Oh, I know why he's not speaking to you. Because he's not over you. (to George) Man, you got laid. It went badly. A man would move on. But you, you mope around this place like a dog that likes to get kicked. You make me sick. And if it wouldn't get me thrown out of the program, I'd smash your pathethic little face right into that locker.