BLEW OUT A TIRE,SPUN 180 DEGEES FACING ON COMING TRAFFIC,HEAD ON COLLISON WITH FORD PICK UP. HIGHWAY SPEED.AIR BAG DEPLOYED.MOTOR FOR DRIVERS SEAT APPARENTLY BROKE OFF AND DRIVERS SEAT SLID FORWARD ,PINNING DRIVERS LEGS BETWEEN SEAT AND BOTTOM OF DASH BOARD,RESULTING IN BREAKING BOTH FEMURS,RIGHT KNEE AND KNEE CAP WITH COMPOUND FEACTURES.SEAT MOTOR WAS FOUND IN FRONT FLOORBOARD , NEAR BRAKE PEDAL ,WITH PLASTIC MOUNTING EARS BROKEN OFF AND SCREWS STILL IN PLACE. SEAT APPEARS TO BE FURTHER FORWARD THAN SEAT ADJUSTMENT WOULD ALLOW.