CRISTINA: "We're in an elevator. That's your specialty, right? McDreamy moments in the elevator?"
DEREK: "Dr. Yang-"
CRISTINA: "You know what? For just a moment, I’m not Dr. Yang and you’re not Dr. Shepherd. You’re the guy who screwed up my friend. The guy who drove her to get a dog she can't keep, the dog she only got because her boyfriend lied to her about his wife."
DEREK: "I never lied to her."
CRISTINA: "Yes you are. You know, I know a liar when I see one because I am a liar."