The stab actually came off? I guess I was under the impression that it was just "flapping" back there with no control over it after the jackscrew disconnected (or whatever the deal was back there).
Either way - a mechanical failure that has nothing to do with a lack of systems knowledge (like Fifi's accident in France).
Correct, the stab actually stayed attached when the jackscrew broke, and at that point the whole stab just slammed around wherever the relative wind put it.