DRIVER WAS REARENDED BY ANOTHER VEHICLE TRAVELING AT ABOUT 50 MPH, AND WAS PUSHED INTO THE BUMPER OF THE VEHICLE IN FRONT. DURING THE COLLISION THE SEAT BACK MECHANISMS BROKE AND ALLOWED THE RECLINE TO A 45 DEGREE ANGLE, THE SHOULDER STRAP OF THE SEAT BELT SLID DOWN TO HER ARM, AND SHE WAS THROWN INTO THE STEERING WHEEL SINCE THE AIR BAGS WERE NOT DEPLOYED. VEHICLE WAS TOTALLED, AND DRIVER SUSTAINED INJURY. *AK *ML