Things can easily go wrong on this type of flight. Learning how to instruct puts different pressures on pilots and the learning curve is very steep. For example:
Early on during my QHI course, in the early 1980s, I was flying an RAF Gazelle on a mutual sortie with my Navy stick buddy, who had previously shown himself to be a pilot who often flew in a "highly spirited fashion". Until that time, both of us were used to flying single pilot.
To cut a long story short, he was supposed to be acting as my student and after demonstrating whatever manoeuvre it was we were teaching / practicing ( I can't remember now what that was, it was 35 years ago), I gave him control. A few seconds later, the nose went down and the speed increased markedly as advertised then the nose came up very sharply and I thought my "stude" was bored again and about to show me (again) how the Navy flew a wingover. However, as the aircraft went well beyond 90 degrees nose up, I began to think "What the Hell is he doing...?" I looked across at him, only to see him looking across at me with a strange look on his face and at that point we both realised that neither of us was actually flying the aircraft and that it was about to loop all by itself. We both said the same word beginning with "S" and we both grabbed the controls. Thankfully, we both decided that a roll off the top was the best way out of this rather extreme "U. P." and we both decided to roll the same way. We learned quite a lot about being an instructor that day.
Edit: Just checked my old logbook - at that time I had about a thousand hours more than these unfortunate pilots appear to have had.
Last edited by ShyTorque; 2nd July 2019 at 23:03.