The young son of a doctor is playing in his father's office with a friend while the physician is seeing patients in the examining rooms. At one point, the son opens a closet door and shows his friend an articulated skeleton.

The other boy wants to play with it, but the doctor's son tells him they can't touch it.

"My dad would be angry if anything happened to that skeleton," he says. "He's really proud of it."

"Is he?" asks the friend. "Why?"

"I don't know," the doctor's son answers. "Maybe it was his first patient."