And that raises an interesting naif style off topic question.
Presume you have something like an A330 falling like a leaf in some form of level stall with minimal forward velocity. What happens if you could extend flaps on ONE side only. Could that be guided into a new configuration from which escape from the stall would be possible?
I think it would tend to toss the wing with no flap extension downwards. Then the tail would point the nose downwards at a bloody scary angle. But that might allow enough airspeed pickup to allow the plane to get engines started and pull out to level flight.