J.D.: Cool. I'll see you tomorrow.
Dr. Casey: Uh, actually, no. I got a call - I have to go back to my hospital.
J.D.: Why? Why do you have to do that?
Dr. Casey: Well, look at it this way: Uh, I may be leaving here, but I will always be there. (points at J.D.'s heart)
J.D.: I know.
Dr. Casey: I am so messing with you!