It doesn't sound like a flat spin to me at all.

It does sound like either a spin or a spiral dive. More likely a spiral dive. They are slightly differnet, but you can get there in basically the same way. Spiral dives kill more models than just about anything else I've seen. The plane spirals down in a nose-down attitude at a pretty good speed, while the pilot holds up elevator and wonders why the plane doesn't pull out.

What's happening is that the wing is stalled, and holding the up elevator is keeping it stalled. The way out of it is to let go of the elevator, wait a moment, then gradually pull out.

Releasing the elevator all by itself will cause the nose to drop a little, and the rotation should stop as the angle attack of the wing goes down and the wing resumes flying. The rate of descent will increase as the rotation stops. That increase in speed is your cue that you have flying speed again, and can start the pull out, since you've transitioned in to a normal dive.

Note that if you do this too close to the ground, you're doomed, no matter what you do. Recovery takes altitude. From 60' up, you were doomed the moment the wing stalled, everything after that will just affect where the crash happens and how deep the crater is.

I've also seen guys get into a "panic" after snapping out of a maneuver with plenty of altitude. They sprial dive, then let off the elevator a little, then pull hard, and go right back in to another spiral dive. (For some reason, 99% of the time, the 2nd one rotates the opposite direction from the first. I think because the pilot is probably holding some aileron in an effort to "correct" the first spin/spiral dive, which makes things worse).