The Circle game

The boys played this at Heathrow arrivals waiting for mum to return from Russia today.
Basic rules, (taken from Malcolm in the Middle) if you can get your opponent to look at your hand making the circle gesture below waist height you get to deliver a free punch on the arm.
This went well until Zebedee here knocked the phone out of a waiting mans hand which fell to the floor and exploded into three pieces.

Thankfully it was reassembled and I managed to get it working so it was all kept under control