A few decades ago, I was right seat in a Viscount simulator when PF managed to get inverted (with the help of a white on black WWII vintage AH) at 16,000'.
I spent the next minute or so shouting in his ear that:
- We're upside down!
- Roll it back up!
His auditory channel had very firmly shut down
I had a little talk with myself about how hard it is to take over -- and that if I want to walk away from a similar situation in a real a/c, I'll have to take over in time to recover.
There's major psychosocial barriers to the FO taking over.
I second the suggestion that the simulator is a good place for PF to set up a situation where PM has to intervene.