Don't worry, you get annunciations when that happens. The sad thing about the WN crew was that they claim not to have noticed any of this. Unbelievable! What's the benefit of having all of those really cool LCD panel displays showing maps galore and a bazillion annunciation modes if two guys are so clueless that they seem to have missed all of it?
Simultaneous, bilateral crew incapacitation is more than slightly difficult to swallow. It's impossible for my addled brain to absorb. Well, they are effectively grounded now, so the immediate threat to the public is removed. The flight deck crew is where they should be, and that's a good thing. Still, it will be interesting to see what the truth of the matter is.
Which is why I said in my initial post on this thread that I think this was some sort of purposeful test.
ML/NJ