I WAS DRIVING IN THE FAST LANE ON THE FREEWAY AT ABOUT 64 MPH. ANOTHER CAR, WHO WAS DRIVING FASTER THAN I WAS, WAS IN THE CARPOOL LANE TO MY LEFT. HE SLAMMED INTO MY CAR ON THE DRIVER SIDE PASSENGER DOOR AND TIRE. I THEN SLID DOWN THE FREEWAY ALMOST SIDEWAYS WHILE I WATCHED HIS CAR ROLL OVER 3 TIMES BEFORE SLIDING TO A STOP. NONE OF MY AIR BAGS DEPLOYED. I HIT MY HEAD AND LEFT SHOULDER, TWICE, AGAINST THE WINDOW AND THE HARD PLASTIC PART BY WHERE THE SEATBELT COMES OUT. I WAS LUCKY AND WALKED AWAY WITH A CONCUSSION, SEVERE NECK PAIN, AND BACK PAIN. THE OTHER DRIVER WAS ARRESTED FOR A DUI. I AM VERY CONCERNED THAT THE AIRBAGS DID NOT DEPLOY. GOOD LORD! HOW HARD DO YOU HAVE TO BE HIT?