Re: Negligent certification
MCAS is not a magic device, it operates by using the stabilizer trim system. There is training in place for handling unexpected stabilizer trim changes. https://www.youtube.com/watch?v=3pPRuFHR1co&t=155s That sound of a twig dragging on a pot lid is from the stabilizer trim system with a fault condition. It is clearly audible over the accurately simulated sound level in the cockpit. Doesn't matter what the fault condition that starts it, the required response is the same, turn the motors off. As mentioned in the comments the only thing the instructor missed is that there are flip-out handles on the trim wheels to make cranking the wheels go faster.
Biting the hand that feeds IT
