Here is an interesting aerodynamic one. When I was a staff cadet on 613 many years ago, I flew one of the last flights of the C.O.S/L Purchase???
We were winched up in XN150, and he requested I did a spin. Well, usual input, pull up, full left rudder as it stalls, and round it very leisurely wallowed. We landed, and he said we'll do it again, but watch. We winched, he pulled up to the stall, just before, full left rudder, and then he applied full RIGHT aileron!!. Boy, did that spin sharply to the left.!!!!!!
We discussed on the ground, and then I got it!!. If you are wanting to spin to the left, then by applying right aileron moves the left aileron down at the point of the stall. Sudden increased A.O.A on the left wing, which then stalled VERY smartly!!!. There was a very good lesson here. I went on to PPL flying 17 years later, and never forgot the lesson that trying to pick up a wing, at very low speeds, with aileron alone can have VERY serious consequences!!!!. Fly safe out there!!.