OWNER PUT VEHICLE IN REVERSE WHEN VEHICLE SUDDENLY ACCELERATED BACKWARDS AND HIT A VEHICLE, THEN IT ACCELERATED FORWARD HITTING ANOTHER PARKED CAR; THEN RAN ONTO THE SIDEWALK. THE VEHICLE STOPPED WHEN TURNED OFF, BUT DID THE SAMETHING WHEN TURNED BACK ON AND PUT INTO GEAR. DEALER SAYS MAY HAVE BEEN THE RUG. *AK