Here's one lesson I learned (and it's a fling wing thing) - cover the right pedal at all times (R22).
Early/low time student, first attempt at an auto. Briefed it, demo'd it, joint flown it, now left to Bloggs to do it (with me covering controls). "Practice Auto, 3, 2, 1" followed by huge bootful of left pedal (it should be right), whereupon machine does beautiful 360 at approx 70kts and instructor's life flashes before him as well as the countryside at 2500ft!