The origin of this question is that my friend is looking at the CPL requirements for gyrocopter. Turns out they require 2.5 hrs of hood time (strange amount, half what's needed for a heli and half again for fixed wing), including unusual attitude recovery. Presumably that just means relatively gentle stuff under the hood. But it got him thinking about seriously unusual attitudes.
Thinking more about the dynamics of a GC I guess just holding back stick and keeping a careful eye on RRPM (just like a heli auto) ought to work. There's nowhere near enough lift to turn that into a loop, so the nose will slowly drop to a more normal attitude, and then you can just fly out of it. Does that make sense? (I'm not a GC pilot and have no particular ambition to be one, though it was fun the one time I tried it).