when a player joins a golem gamem he has to wait until the round is over. but when he joins he will appear in the game for some seconds. if you hit him once he will die and you will get a kill to get chaos faster.
that works sometimes in a solo or tdm game too when a player respawns. if you know where a player repawns move to this point and click right mousekey to do special. when the player respawns attack him. you must be fast.