CUSTOMER TRUCK DRIVER WAS REMOVING SEAL FROM HIS TRAP CRANK SO HE COULD ADD MORE PRODUCT TO HIS LOAD BECAUSE HE WAS UNDER WEIGHT. HE HELD THE SEAL WITH RIGHT HAND & CUT THE SEAL WITH POCKET KNIFE USING LEFT HAND. AFTER THE SEAL WAS CUT HIS HAND KEPT GOING & HE CUT THE TOP OF HIS RIGHT FOREARM.