EE WAS STANDING BETWEEN TWO SUPPORTS FACING THE SHEAR APPROXIMATELY 3' AWAY. AS THE CUTTING DRUM WAS RAISED, ROOF SPARKS WERE SEEN. A ROOF BOLT PLATE WAS CONTACTED. A PIECE OF DEBRIS STRUCK EE IN RIGHT SIDE OF FACE, NEAR NOSE, BECOMING EMBEDDED IN THE SINUS. SURGERY WAS REQUIRED TO REMOVE IT.