I just remembered that I found THE FIFTH DOCTOR yesterday.
While talking to another neurosurgeon about pain management, one of the questions he asked was, "Do you smoke?"
ME: "No. I quit about 3 years ago. 50 years of Camels."
HE typed something into the computer and said, "Lucky Strikes."
I assumed he was saying that is what he used to smoke, so I said, "So you're the fifth doctor, huh?"
He paused and looked at me, his expression clearly asking WTF I was talking about.
I said, "When I was a kid, the TV told me that '4 out of 5 doctors smoke Camels.' Because you did Luckies, you must have been the fifth doctor."
He laughed and turned back to his computer.