On a chilly Sunday afternoon there a match going on the local field. It’s a feisty affair on the pitch between two of the local pub teams – but just as the ball is about to pass the posts something has caused the referee to blow his whistle – but not for the on field antics. Put yourself in the boots of the striker running away from the action and try to imagine what has interrupted his celebrations as he runs for the touch lines for safety – that is what you are puzzling.