I have to say Rotorboy is right in many cases. However we have a little situation in the Southwest called the "Grand Canyon" For those who have flown there on shall we say Breezy days. It will seriously kick your a$$. Many pilots while trying to keep the world level there have had the sweet occasion of getting into jack stall. From their descriptions it happened while making many manuevers to stay upright.
I can say that I have not encountered it myself, and really it would scare the sh1t out of me anyway. So after thirty six years of stick time, heres hoping I never do find out what fun it can be.