Steve,

For a wall, you have to "break through" the stall into the realm of "induced lift" aka high alpa. So, the maneuver has to be reletively quick. Also, power is key. Just as you are passing the point of the stall you have to add in power. Too little power and the stall will escalate and it may snap. Too much power and one of two things can happen: it will keep climbing, or it will snap in the direction of the torque, P-factor, accelerated slipstream, and gyroscopic procession (or is it pre-cession?). You know, to the left. Clear as mud? Basically you just do it, stop thinking.

I tried to post some pics but RCU says there is an error while saving. Take a look in my gallery, they are there.