How about sharing stories on things we've done on helicopters that came out right but it wasn't a good idea to do??
I'll start with mine:
At the beginning of my civilian pilot carrer I was taking my 212 rating with an instructor that wasn't very experienced in helicopters in general nor in the model itself, so when we started doing emergencies practices, I ended up showing the guy full down autos, 180īs, 360īs, T/R failures and hyd failures (after all a 212 was to me a Huey with 2 engines more or less)

and I had been a test and instructor pilot on several models, singles and twins, in the Army long time before.
The thing is we did Hyd failures with BOTH HYD SYSTEMS OFF

not a big deal after all

Short while after that flight I read in the FM that you should never turn off both systems at the same time. I've never done it again since then
Not proud of it but it happened
Buen vuelo
Keep them coming !!