EE WAS OPERATING #20 ST8 LOADER IN REMOTE. HE WAS MOVING A LARGE BOULDER OUT OF LOADING AREA. HE WAS STANDING ABOUT 10' FROM PILLAR AND ABOUT 10' FEET FROM LOADER. HE BACKED LOADER OUT WITH BO ULDER IN DIPPER AND STARTED FORWARD WHEN THE REAR OF THE LOADER CAME OFF THE GROUND AND SWUNG AROUND AND HIT HIM, KNOCKING HIM UP AGAINST A PILLAR.