During incipient vortex ring demo and recovery, student first action was to lower the lever, say "oops" then raise the lever sharply again! (Not recommended !!) The effect was to immediately place us in full vortex ring state....... eventual recovery completed only a few hundred feet above the ground.
Also beware of some students throwing their hands in the air during a practise, or real emergency and saying that it is in the hands of their particular maker........
Assume you are starting out in the world of instructing. Good luck and keep your eyes open!