Re: undoubtedly
The only explanation is that their brain is so messed up / chemically imbalanced and/or delusional that they have lost any connection to reality and/or they misconstrue, as in this case the pilot banging on the door, to mean that those are the demons coming after them or whatever. It is sad all the way around.
They say all Lufthansa (owns and operates the Germanwings brand) pilots have a check up, hopefully including a mental or psychiatric check up once per year. Frighteningly, some of the airlines out there do not have any physical or psychiatric check up other than maybe when they are hired. Lufthansa and many other more reputable airlines, require pilots to have checkups every 6 months after the age of 40.
I have a childhood friend of mine, who I haven't talked to in 6 or 7 years at least. We are such good friends- our friendship goes back to Day 1 on the planet for him (he's 15 months younger)- that I know we can pick up the phone and the years melt away like we just talked a week ago. Anyway, he has a son who started having hallucinations in his fraternity house as a freshman and luckily, his fraternity brothers were sensitive enough and smart enough to realize that he wasn't just drunk or whatever, and called his parents and the University police / emergency. Unfortunately, he was diagnosed with schizophrenia. I cannot pretend to imagine the road they have been traveling down and will travel down as parents and as a family. Luckily he is a very successful medical device sales manager 30 years into his career, and also has substantial family money beyond that, though all of that seems very inadequate I'm sure. Life doesn't continue or end well in almost all schizophrenic cases, at least in terms of having any sort of 'normal' / productive life.