WHILE OVERSEEING A HATCH DOOR OPENING ON A DRILL, THE EMPLOYEE REACHED INTO THE OPENING TO FREE SOME ELECTRICAL WIRE, AS HE DID THIS A WELD ON THE HYDRAULIC RAM THAT WAS OPENING THE HATCHDOOR BROKE LOOSE. THIS CAUSED THE DOOR TO COME DOWN STRIKING THE EMPLOYEE ON THE BACK OF THE HEAD CAUSING A LACERATION REQUIRING 3 SUTURES.