WOW, if this thread has all that pilots know about aircraft stalls, well I am glad that I am not in an airplane that anyone here is flying. To get into a stall is easy if you let it. Getting out of a stall is easy if you have enough altitude -- not much unless you snap-stall into a spin - then things can get your attention.

Rob 2160 told you about all you need to know. When one allows a model to spin without pilot's attention, then that is simply poor pilot attention and not thinking ahead.

Have I ever stalled an airplane? Yes several times, about 20,000 FT. above ground level and then snap into an inverted Spin, then recover. Easy and fun if your airplane is significantly stressed for such a maneuver.
RC model airplanes will snap into a spin when load factor is beyond the limits of whatever maneuver the pilot is attempting.. Recovery is not a problem if you are doing it for fun. If it catches you down low and not expected, then probably a tad different.

Guys there are many books about such stuff, be it sub-sonic , sonic, or super-sonic airflow. Many of them are good and many are absolute garbage. Your choice. I have not yet performed above sub-sonic speed with an RC model. I have done so with my butt in a cockpit!