The B737-300 flight simulator I instruct on has a malfunction button whereupon full hard over rudder pedal is applied in an instant. It is dramatic and as expected the aircraft yaws then rolls sharply accompanied by the inevitable spiral dive.
Instant hard over aileron stops the yaw and roll and the aircraft is controllable at its crossover speed. Unless the pilot reacts instantly with full opposite aileron, the aircraft will crash. Most pilots in the simulator lose control immediately unless they have been previously briefed on how to recover. Which of course they would have.