So-called performance artists laid a nasty trap for any half-cut football fan that had been indulging in Germany’s beer at the 2006 World Cup. They filled leather footballs with concrete and left them invitingly around Berlin with a sign in English «Can u kick it?». What football fan worth his salt could resist such an invitation? Several didn’t and ended up in hospital with foot injuries. Police arrested several people, thought to be a group of Austrian artists.