COUGH IT UP

A dad walks into the market followed by his
 ten-year-old son. The kid is
spinning a 25 cent piece in the air and catching it
 between his teeth.
As they walk through the market someone bumps into
 the boy at just the wrong
moment and the coin goes straight into his mouth
 and lodges in his throat. He
immediately starts choking and going blue in the
 face and Dad starts
panicking, shouting and screaming for help.
A middle-aged, fairly un-noticeable man in a gray
suit is sitting at a
coffee bar in the market reading his newspaper and
sipping a cup of coffee.
At the sound of the commotion he looks up, puts his
coffee cup down on the
saucer, neatly folds his newspaper and places it on
 the counter. He gets up from his seat and makes his unhurried way across the market.After reaching the boy (who is still standing, but
 only barely) the man carefully takes hold of the kid's balls and
 squeezes gently but firmly.
After a few seconds the boy convulses violently and
 coughs up the 25 cent piece,which the man catches in his free hand. Releasing the boy, the man hands the coin to the father and walks back to his seat in the coffee bar without saying a word.
As soon as he is sure that his son has suffered no
 lasting ill-effects, the father rushes over to the man and starts effusively
 thanking him.  The man looks embarrassed and brushes off the father's
 thanks As he's about to leave, the father asks one last question: "I've never seen anybody do anything like that before - it was
 fantastic - what are you, a surgeon or something like that?"
"Oh, good heavens no" the man replies "I work for the IRS."