In a flat spin (like that pictured in the movie), there is a total loss of lift at the wings. Since the aircraft is spinning about a vertical axis through its center of mass, increasing engine thrust doesn't work because the thrust is continously vectored in a shifting direction as the aircraft spins, and thus the aircraft gains no velocity from engine thrust that would be beneficial for generating lift. Again, no lift, no flight...
I'm no avionics expert, nor am I well experienced with flight sims nor do I hold any type of pilots license, but I believe that if you could get the nose of the aircraft pointed toward the ground,a nd given enough altitude, you could recover from a flat spin. Unfortunately, the same conditions in a flat spin that prohibit lift likely also eliminate any chance that the control surfaces- elevators, alerons, flaps, rudder, will have much effect on vectoring the aircraft....
