BACKING OUT AND WAS TURNING THE WHEEL. SHIFTED INTO DRIVE, AND ENGINE STARTED TO ROAR. RPM'S WERE UP. TOOK OFF. WAS OUT OF CONTROL, AND WAS SPINNING SEVERAL TIMES. THEN, HIT A SNOW MOBILE TRAILER WHICH STOPPED VEHICLE FROM SPINNING. PEDAL WAS IN NORMAL POSITION. FOOT WAS NOT ON BRAKES OR ACCELERATOR PEDAL. VEHCLE OUT OF COMMISSION. *AK