EE WAS ASSISTING IN THE UNLOADING OF A CRUSHER. SUPERVISOR WAS OPERATING THE LINKBELT CRANE. THE CHAINS HOLDING THE CRUSHER CAME LOOSE AND BEGAN TO SWING IN A SPIRAL MOTION. SUPERVISOR VERBALL Y WARNED EE TO ""WATCH THE CHAINS"", EE PUT HIS ARM UP TO BLOCK THE CHAIN BUT A PIECE OF THE CHAIN CAME UP THROUGH HIS ARMS AND HIT HIM IN HIS MOUTH BREAKING OFF 3 TEETH.