2008 TOYOTA AVALON. STOPPED IN TRAFFIC, FOOT ON BRAKE. WITHOUT WARNING, CAR ACCELERATED FORWARD. PUSHED HARDER ON BRAKE AND CAR NOSE-DIVED AND COLLIDED WITH PU TRUCK STOPPED AHEAD. AVALON FRONT BUMPER WENT UNDER REAR BUMPER OF PU . AIR BAG DID NOT DEPLOY. FLOOR MAT STILL IN PLACE. $5600 DAMAGE TO AVALON, NONE TO PU. *TR