This was the ultimate playground Game. One time we must have had every kid in the school playing it (until it was banned). The idea was to get from one side of the tennis courts to the other without getting tagged. It started off with one person trying to tag the others and everyone he got were then taggers for the next round, everyone they got were taggers, etc... Basically it was high speed chaos, and split heads as you avoided being touched. My favourite trick was to pretend that I wasn't 'it' and then get unsuspecting victims by surprise. This only worked because there were 100+ kids playing most lunchtimes.