EE WAS LOADING CAPSTON AND STRIPPING INTO 100 TON TRUCKS WITH A CAT 992G WHEN HIS BUCKET TEETH HOOKED INTO A SEAM IN THE CAPSTONE. WHILE TRYING TO LIFT THE BUCKET, THE BACK OF THE MACHINE CAM E OFF THE GROUND. WHEN HE BACKED AWAY FROM THE WALL, THE BACK OF THE MACHINE CAME DOWN, JARRING HIM, CAUSING HIM TO BOUNCE IN THE SEAT.