I WAS BACKING CAR OUT OF DRIVEWAY WHEN ALL OF A SUDDEN CAR ACCELERATED HITTING CURB, RAN UP AN EMBANKMENT AND CRASHED INTO NEIGHBORS FRONT STEPS. THIS IS THE FIRST TIME IT EVER DID THAT. IT APPEARS THAT THROTTLE MUST HAVE STUCK CLOSE TO MAXIMUM ACCELERATION AS CAR CLIMBED UP A 10-12 FOOT EMBANKMENT AND HIT NEIGHBORS BRICK FRONT STEPS WITH SUCH FORCE IT PICKED REAR WHEELS RIGHT OFF THE GROUND.