WHILE SLOWING WITH TRAFFIC ANOTHER VEHICLE CAME FROM LEFT HAND LANE AT ABOUT 45 MPH AND HIT CONSUMER'S VEHICLE ON THE REAR. THEN, CONSUMER HIT CAR IN FRONT OF HIM. UPON IMPACT, DRIVER'S SEAT BROKE AND FELL BACKWARDS. *AK THE PASSENGER SEAT BROKE TOO. THE AIR BAGS FAILED TO DEPLOY. *YH