VEHICLE SPEED CONTROL: WHILE PREPARING TO BACK UP, BEFORE SHIFTING, VEHICLE JUMPED, AND THEN SUDDENLY ACCELERATED FORWARD, BRAKES WERE APPLIED BUT VEHICLE WOULDN'T STOP AND ENGINE WAS ROARING AS IF THE ACCELERATOR WAS STUCK. VEHICLE WENT AIRBORNE OVER AN EMBANKMENT, THROUGH A LAWN, HIT A ROCK/DEBRIS AREA, TIRE BLEW BEFORE HITTING CURVE, LANDED ON RIGHT RIM, WAS THEN ABLE TO PUT VEHICLE IN PARK. VEHICLE TOWED AWAY, DEALERSHIP CURRENTLY STATES NOTHING IS WRONG WITH THE VEHICLE. HELP!! *JB