VFRetc
I was on a QHI course years ago. My instructor had read his guide on how to demonstrate jackstall in a descending turn. Unfortunately, he read "left", but remembered "right". 140kts in a 60degree banked turn to the right and he pulled several G. The beast did "exactly what it says on the tin" and pitched up and rolled RIGHT. My selections of chinagraphs and Newport Shrops were above me as we went round the complete roll. I asked for (and got) an instructor change the next day!