J.D.: [v.o.] I know if I just follow Dr. Kelso around for a while, he'll eventually do something decent. I'm a master of stealth, I can sneak up on anybody.
Dr. Kelso: Why are you following me?
J.D.: Sir, aren't you being a little paranoid?
Dr. Kelso: I was in 'Nam, you know. They pulled off my fingernails.
J.D.: When did you get an earring?
[flashback:]
Dr. Kelso: Enid, I'm not cheating on you. This earring is mine. [with a bloody ear] See?
[present:]
Dr. Kelso: It's a hip-hop world, son. Keep up or get out of the way.
J.D.: [v.o.] I gotta get an earring.