WHILE DRIVING ON FREEWAY I WAS STRUCK BY A DRUNK DRIVER GOING APPROX. 70-75MPH. I WAS HIT IN THE LEFT REAR OF THE CAR AND I WAS IMMEDIATELY THROWN BACK.AFTER PULLING OVER I FOUND OUT THAT THE SEAT BACK HAD BROKEN AND WAS IN THE FULLY RECLINED POSITION. I WAS UNABLE TO PULL THE SEAR BACK TO IT'S UPRIGHT POSITION, IT ONLY WENT HALF OF THAT DISTANCE.