(They are studying for their test)
Izzie: Cristina, if you're not gonna let us sleep you at least have to let me put coffee in my cup.
Cristina: Okay so go, nothing is stopping you.
Izzie: No, I'm too tired. (puts cup down, Alex answers Cristina's question, instead)
Alex: I can't believe O'Malley's missing this, how's he gonna be ready?
Cristina: Oh, you're kidding. We have Callie's cards but George has...
Izzie: ... George has Callie.