THE INJURED PLACED HIS LEFT HAND ON THE DRILL MAST, REACHED UP WITH HIS RIGHT HAND, AND GRASPED THE DRILL STEEL TO REMOVE IT FROM THE DRILL HOLE. DURING THIS PROCESS HIS LEFT MIDDLE FINGER WAS EITHER STRUCK BY OR CAUGHT BETWEEN AN UNKNOWN OBJECT AND/OR OBJECTS CAUSING CRUSHING INJURIES TO THE DISTAL PHALANGE OF THE LEFT MIDDLE FINGER.