THE EE WAS OPERATING THE LEFT SIDE OF THE DUAL HEAD ROOF BOLT MAHCINE. HE WAS IN THE PROCESS OF DRILLING THE LEFT BOLT HOLE (OUTSIDE HOLE) HE STATED THAT A PIECE OF ROCK FELL FROM THE ROOF STR UCK THE CANOPY & THEN CAME UNDER THE CANOPY AND STRUCK HIM ON THE LEFT SIDE OF THE NECK, LEFT SHOULDER & LEFT FOREARM. THE ROCK MEASURED 3""X4""X2"" THE COAL SEAM WAS 78"" HIGH & THE ENTRY MEASUR