White Shadow,
Further to your post - I was flying as a trainee helicopter instructor with my similarly qualified "stick buddy" who, like myself, was known as a bit of a "spirited " flyer. We had a small misunderstanding who was flying the helicopter once we got to 140 kts. As we rapidly went from nose down to about 100 degrees nose up we realised no-one was, actually. We both immediately took control and jointly carried out a shaky roll-off-the-top.
The debrief took place soon afterwards and we both learned about flying & instructing from that.