koby hodder 's heart stopped for a staggering 12 minutes after he collapsed while running around with friends during the morning break .
he was playing british bulldog or a game in which children run from one side of a playing field to another without being caught by one of the ` bulldogs ' , who often employ forceful tactics to the ground .
teachers across the country have called for the game to be banned , claiming it is dangerous and leads to children becoming injured that