EE WAS OPERATING A 992G LOADER. WHILE DIGGING, BUCKET CAME IN CONTACT WITH A LARGE ROCK CAUSING REAR OF LOADER TO COME OFF THE GROUND. WHEN REAR OF LOADER RE-CONTACTED THE GROUND, EE WAS BOUNC ED IN THE SEAT CAUSING LOW BACK PAIN. EE IS SHORT & LIGHTWEIGHT & MUST ADJUST SEAT TO LOWEST POSITION TO REACH PEDALS. BY DOING THIS CAUSES THE SEAT TO LOSE ITS SHOCK ABSORBING CAPABILITIES.