Checkboard makes some great points above.
I can remember doing conversion training in the Shorts SD360 (conducted in the aircraft) and seeing an instructor get maxed out during a V1 cut and lose situational awareness. Luckily, the student sorted it out but it could have been very, very nasty. In case you are wondering how I knew about it, it was SOP in those days to take four guys up plus the instructor... one guy flying, one observing (by standing behind the trainee in the doorway), and the other two raiding the galleys and waiting their turn to fly. Wouldn't happen these days... I hope...