If this was an anti-stall manuver, wouldn't they have been given a cue from the auditory warnings and the stick shaker as to what was about to happen? I know that stick pushers (that literally take the yoke out of your hands) are common on these aircraft, but I'd be surprised if it was actually so strong that a human could not overcome it.
Stick shakers aren't a fix. The pilot in the Colgan air accident kept pulling back even though the plane activated the stick pusher; he kept pulling back until that disengaged.
Even the best designed plane will eventually meet a pilot that can fly it out of the air.
