One of my 'moments':
Instructing on Wessex, we were conducting a low level navex to the South of Shawbury. We had crossed into a neighbouring LFA and, at that time, had to climb to 250 ft agl. This stupidly put us firmly into fast jet territory.
Everything was going smoothly, and I was relaxed in the LHS. I suddenly caught a movement in my right peripheral vision. I looked right, and all I could see was wall-to-wall Harrier. It went abut 5 ft over the top of us, and I heard and felt it.
A split second later I heard a machine-gun sound and felt sudden vibration. My student (D..... W.....) had dumped the collective lever and pulled full aft cyclic. He was hitting the droop stops! I immediately took control, gingerly exercising the controls to assess whether we still had a tail rotor. We had and, after DW had composed himself, we carried on with the sortie.