CONSUMER WAS TRAVELING ABOUT 42MPH ON HIGHWAY AND ANOTHER VEHICLE WAS MERGING INTO ANOTHER LANE, AND VEHICLE IN FRONT APPLIED THE BRAKES. VEHICLE IN BACK HIT, AND THERE WAS A FIVE CAR PILE UP. CONSUMER WAS THE LAST OF THE CHAIN LINK, AND DRIVER'S SIDE AIRBAG DIDN'T DEPLOY.*AK