THE EE WAS ATTEMPTING TO IDENTIFY LEAKS IN A PONTOON ON A PUMP BARGE. APPARENTLY HE CONNECTED A COMPRESSOR TO THE END PLATE OF THE PONTOON VIA A THREADED NIPPLE, A HOSE WITH A VALVE AND AN AIR PRESSURE GAUGE. THE END OF THE PONTOON RUPTURED AND APPEARS TO HAVE HIT THE EMPLOYEE IN THE HEAD. BECAUSE THERE WERE NO WITNESSES, THE EXACT PROCEDURE & POSITION OF EE'S BODY DURING THE