I'm a rotary FI(R), but I'm sure this happens occasionally with any kind of aircraft, so advice would be welcomed.
Like many of us, I frequently joke about students trying to kill me, but yesterday one came just slightly too close to it for comfort.
He was a trial lesson student, who was managing to fly quite well with the cyclic, and asked if he could try the collective too. I agreed, since you hardly have to do anything with it in straight and level flight. We then started to descend, and I found the collective was locked solid. I asked him to let go, but he was concentrating too hard to even hear me. I then yelled at him to get off the collective, which worked. But...what if it hadn't? He was about twice my size; no way could I have overpowered him if I'd needed to. So, if it comes to the crunch (or rather, avoiding the inevitable crunch
) where do I hit someone, or how do I disable them effectively, without losing control of the aircraft in the process?