I WAS A PASSENGER IN A 2002 HONDA CIVIC (2-DOOR) INVOLVED IN A HEAD ON COLLISION WITH A HYUNDAI ELANTRA. MY AIRBAG (PASSENGER SIDE) DID NOT DEPLOY, BUT THE DRIVER SIDE AIR BAG DID DEPLOY. ADDITIONALLY, MY SEAT (PASSENGER SIDE) BROKE LOOSE FROM THE FLOOR MOUNTS AND DID NOT RESTRAIN ME FROM SMASHING FORWARD INTO THE DASH WITH MY LEGS AND FORARMS TAKING THE IMPACT. AS A RESULT OF THE SEAT BECOMING UN-FASTENED I SUFFERED BRUISING AND LACERATIONS ON MY LEGS AND ARMS AND NECK AND BACK INJURIES FROM MY HEAD WHIPLASHING BECAUSE A LACK OF AIRBAG DEPLOYMENT. THE DRIVER DID NOT SUFFER ANY BACK OR NECK INJURIES BECAUSE HIS AIRBAG RESTRAINED HIS HEAD FROM "SNAPPING" FORWARD. TO SUMMARIZE: PASSENGER SEAT CAME LOOSE FROM FLOOR MOUNTS AND PASSENGER SIDE AIRBAG DID NOT DEPLOY.