and physically hold both of them closed against the servos all the way to the flare; then hold them closed all the way down the runway until releasing just one of them prior to the excursion?
Wont/shouldn’t happen. Auto throttle disengagement occurs 2 seconds after touchdown. Now whether they pressed TOGA on the deck after TD prior 2 seconds is another matter, I suppose then, they could have held the thrust levers at idle.