DRIVER WAS REAR ENDED ON THE HIGHWAY WHEN AT A DEAD STOP BY A VEHICLE GOING AROUND 60-70 MPH. THE BOTTOM OF THE DRIVER'S SEAT JERKED FORWARD AND IMPACTED DRIVER LEG CAUSING CONTUSIONS AND THE BACK SUPPORT AND HEAD REST PORTION FLEW BACKWARDS, CAUSING DRIVER GLASSES AND HAT TO COME OFF AND LAND TOWARD THE BACK HATCH OF THE VEHICLE. SPARE TIRE WAS DISLODGED FROM TRUNK AREA AND IMPACTED DRIVER'S HEAD DUE TO THE SEAT BACK BEING IN THE RECLINING POSITION. AIR BAGS DID NOT DEPLOY AT ANY LEVEL AS WELL.