J.D.: Hey, Carla, after you check Mr. Ruck's IV in room 310, can you zip down to the cafeteria and flirt more with Dr. Hot Butt?
Carla: Fine. So I was flirting with him a little. But... I used to have such a crush on the guy! And besides, you flirt sometimes. It's harmless, right?
Flashback to an elevator
Woman: Can I press your button?
J.D.: I don't know... Can I press yours?
The woman starts whacking him with her purse, causing him to fall to the floor, and continues to get beaten
End Flashback
J.D.: Not always harmless.