VEHICLE WAS INVOLVED IN A FOUR CAR PILE UP. DURING THE COLLISION, VEHICLE WAS STRUCK FROM THE REAR AND FRONT, AND AIR BAGS DEPLOYED. REAR SEAT PASSENGER HIT THE FRONT PASSENGER'S SEAT, CAUSING IT TO BREAK. FRONT SEAT PASSENGER SUSTAINED MASSIVE BRAIN DAMAGE AND BLOOD CLOTS. THE PASSENGER IN THE REAR SEAT SUSTAINED A COMPOUND FRACTURE TO THE RIGHT ARM. *AK