A Yuletide meal at an expensive restaurant is disturbed when a woman starts screaming. ‘My son's choking! ‘ she cries. ‘He’s swallowed the sixpence in the Christmas pudding! Please, anyone – help!’

Without speaking, a man stands up at a nearby table, and walks over nonchalantly. Smiling pleasantly, he grips the boy by the gonads and squeezes: the boy coughs, and out pops the coin.

‘Thank you so much!’ beams the relieved mother. ‘Are you a paramedic?’

‘No,’ replied the man, ‘I work for the Inland Revenue.’