Janitor: Heh-hah-hah. You drew on the wall. You drew on the wall!
J.D.: You pulled the paper away!
Janitor: Stop lying. It's gonna come off, right?
[flashback:]
J.D.: Dan, don't! That's dad's indelible space pen! And prom is in like two weeks!
[flashback:]
J.D.: Good evening Mr. and Mrs. Shefford. I'm here to pick up Amy for [points to forehead] prom.
[present:]
J.D.: Yeah. That- That'll come off. You won't have to get laser surgery or skin from your ass or anything.
Janitor: Hmm?