Final comment, note when you come out of the right-hand high-speed flight, that suddenly unloading the TR which swings the nose into the direction of flight will most times give a prompt overspeed of the engine (and MR) the governor is good, but not that good. Then have a look at the MM on overspeeds.... and then go check your bank account.
Every pilot who does aggressive manoeuvres or quick power changes (e.g., as part of game management work) knows this and readily and easily overrides the governor as required. Again, it's a non-event. It is covered in the POM too and really easy to handle once you have experienced it.
The real problem is that at least in my experience this is not taught during any flight training for PPL or leading up to commercial, as all flight training focuses on flying safe and conservative, staying away from the limits of the aircraft as far as possible. Many a R44 pilot would have been caught out unprepared the first time they experience it.
In my view that is wrong and dangerous. You need to know how the handle the a/c at the limit so that you are trained, and current, on what to do if the unexpected happens (e.g., windshear on landing, turbulence, etc.).