EE WAS OPERATING ROOF BOLT MACHINE HE WAS SWINGING BOOM IN TO DRILL HOLE. WHEN BOOM WAS COMING IN, IT STRUCK A PIECE OF DRILL STILL THAT HAD FALLEN. WHEN IT STRUCK THIS, THE PIECE FLIPPED INTO THE AIR AND STRUCK EE IN THE RIGHT CHEEKBONE AND SIDE OF FACE INCLUDING THE EYE AREA AS IT FLIPPED UP. THIS ACCIDENT DID NOT INVOLVE ANY ASPECT OF COMPLIANCE WITH RULES OR REGULATIONS.