A man dies and goes to heaven.

As he's standing in line, the pearly gates slam open and a man charges out.

He's dressed in a scrub suit and a white lab-coat, with a stethoscope around his neck. He knocks over most of the people standing in line in his rush to move through the crowd. The man asked St. Peter, "Who was that?"

St. Peter answered "That's just God. Sometimes he likes to play doctor."