md80fanatic,
It wouldn't matter whether the brakes or spoilers were working or not, at that speed, on that terrain it's going to take a long time to stop from the speed that they were doing at the time. I'd defy anyone to stop even a fast car in one piece from that speed following the same trajectory let alone something that is A.) many times heavier in mass and therefore significantly higher inertia and B.) already partially airborne.