In the supermarket with his dad, a little boy was flipping a 10p piece into the air and then catching it with his teeth. Someone bumped the little boy at the wrong moment and the 10p came down and lodged into the boy's throat.
The boy starts to choke and his father starts hollering for help.
A middle aged man hears the commotion, casually puts his trolley to the side, straightens his coat and tie, and makes his way to the boy and his father.
"Excuse me, sir," the man tells the father. The man reaches down to the still standing (but still choking) boy, carefully takes hold of the kid's testicles, and squeezes gently but firmly. After a few seconds, the boy convulses violently and coughs up the 10p, which the man catches in his free hand. The man releases the boy and walks back over to his trolley.
After making sure his son is ok, the father walks over to the man and thanks him profusely for saving his son's life. "I've never seen anyone do that -- that's amazing! Are you a surgeon?"
"Oh good heavens, no," replied the slightly embarrassed man. "I work for the Inland Revenue."