WHILE DRIVING ON A TWO ROAD HIGHWAY WITH A PICKUP TRUCK IN FRONT. ALL OF SUDDEN THE TRUCK STOPPED, CONSUMER APPLIED BRAKES AND SLID INTO THE VEHICLE. NO DAMAGE TO EITHER VEHICLE. BUT THE OTHER CAR, DRIVING APPROXIMATELY 60MPH FAILED TO STOP AND HIT THE ACHIEVA. THREW THE CONSUMER FORWARD AND THEN BACKWARDS, AND THE SEAT COLLASPED. HASN'T CONTACTED THE DEALER OR MANUFACTURER. *AK