Holy Smokes! As a pilot, his description of what happens in the cockpit during this malfunction sends shivers up my spine. The trim is running wild and every time you try to correct it it goes back to what it was doing. Then the auto pilot pushes the throttles forward and you are completely losing control of your airplane. And add to this, that you are low and slow on takeoff or landing and it's the stuff that gives pilots nightmares.