Where the fuck are huge parachutes for whole cabin? Totally technically plausible.
That's what I always think about when they start yet another demonstration of how to employ the floating vests...
Such a senseless tragedy... What absurd reason can any human conjure up to calmly descend into the nearest mountain with 150 innocent souls on board without so much as a verbal justification or sigh of relief?
Someone who has been hypnotised. The co-pilot might not have been aware of what he was doing. The captain going out might have been a trigger condition for him to take action. The prosecutor mentioned the the co-pilots responses changed from jovial/normal to short when the captain mentioned that he is about to go out of the cabin.
I watched a documentary on Discovery about such "programming".