A dad takes his young son to a large shopping market. The son is holding a 50 pence piece. Suddenly, the boy starts coughing and going blue in the face.
The dad realizes his son has swallowed the coin and starts panicking and shouting for help.
A well dressed, attractive, but serious looking woman in a blue business suit is sitting at a coffee bar in the market, reading her newspaper and sipping a cup of coffee.
At the sound of the commotion, she looks up, puts her coffee cup down on the saucer, neatly folds the newspaper and places it on the counter, gets up from her seat and makes her way, unhurried, across the market.
Reaching the boy, the woman carefully takes hold of his goollies and begins to squeeze, gently at first and then ever more firmly.
After a few seconds the boy coughs up the coin, which the woman catches in her hand.
Releasing him, the woman hands the money to the father and walks back to her seat in the coffee bar without saying a word.
As soon as he's sure that his son has suffered no lasting ill effects, the father rushes over to the woman and starts thanking her saying, "I've never seen anyone do that before, it was fantastic. Are you a doctor?"
"No," replies the woman, "I work for the Inland Revenue!"