I WAS MAKING A LEGAL U TURN ON A CITY STREET TO PARK. I PULLED BEHIND A PARKED CAR AND WAS GOING ABOUT 1MPH WHEN MY CAR SUDDENLY ACCELERATED AND HIT THE PARKED CAR. THERE WERE NO WARNING SOUNDS UNTIL THE CAR HIT THE OTHER CAR AND THEN THE HORN AND LIGHTS ON MY CAR WENT OFF. THE CAR WAS NOT ON AUTO PARK AND NO AIR BAGS WERE DEPLOYED HOWEVER MY CAR AND THE CAR THAT WAS HIT HAD EXTENSIVE BODY DAMAGE. THERE WERE NOT INJURIES TO PEOPLE. I DON'T KNOW WHY THE CAR ACCELERATED INSTEAD OF STOPPING. I HAVE NEVER HIT THE ACCELERATOR PEDDLE INSTEAD OF THE BRAKE AND I DOUBT IF I DID IT IN THIS CASE.