INJURED WAS SITTING IN THE OPERATOR'S SEAT OF A BATTERY POWERED MAC8, STEERING IT WHILE BEING PUSHED BY A SCOOP TO THE BATTERY CHANGING STATION. THE MAC8 BATTERIES WERE DEAD. WHILE IN ROUTE, T HE SCOOP PUSHED THE MAC8 OFF THE GROUND APPROX. 12"" JARRING THE INJURED CAUSING LOWER BACK PAIN.