In the beginning of "My Buddy's Booty" (Season 5, Episode 11), Dr.'s Reid, Cox, and Dorian are talking to a patient who says he gets lightheaded and passes out only when he yawns. Dr. Cox then tells J.D. to tell the patient a story (to make him yawn), and J.D. responds by saying, "Lay off, Bob, okay?" Dr. Cox's name is Perry! Bob is Dr. Kelso's first name.