I WAS GOING APPROXIMATELY 40 MILES AN HOUR WHEN THE VEHICLE IN FRONT OF ME MADE A PANIC STOP AND I CRASHED INTO THE BACK OF IT. MY AIR BAGS NEVER DEPLOYED. THE INSURANCE ADJUSTER SAID MY CAR IS TOTALED AND THERE WAS SOMETHING WRONG WITH MY AIR BAGS BECAUSE THEY SHOULD DEPLOYED. I HURT MY KNEE PRETTY BAD FROM IT HITTING THE DASH.