A DRILL ROD CAME LOOSE FROM THE ROD LOCK AT THE TOP OF THE CAROUSEL. THE DRILLER WHO WAS INJUREDCLIMBED UP THE TOWER TO PUSH THE DRILL ROD INTO POSITION. HIS HELPER LOWERED THE TOP HEAD ONTO THE DRILL ROD TO PUT IT INTO THE CAROUSEL. WHEN LOWERING, THE DRILLER ON THE TOWER HAD HIS HAND IN THE PATH OF A TRAVELING BLOCK & HIS HAND WAS CAUGHT BETWEEN THE BLOCK & THE TOWER.