EE WAS MOVING DRILL FROM ONE SHOT TO ANOTHER, HE STOPPED, AT THE TOP OF THE HILL FOR TRACKS TO MOVE, HE PROCEDED DOWN THE HILL ABD STARTED TO MOVE FASTER, HE ATTEMPTED TO APPLY THE BRAKES BUT DRILL WAS MOVING TOO FAST TO STOP. HE DROVE IT ONTO THE BERM TO STOP IT. DRILL STOPPED IN SLOW MOTION AND ROLLED OVER.