Yep. Leaky lungs at high altitude even in very fit individuals. Can you imagine someone on that line asking “ Hey anyone have any Lasix they can spare?” Its a terrible way to die.
They have a hand pump facemask used for emergencies. Helps inflate the lungs to max.
more deadly and probably more uncomfortable is high altitude cerebral edema. The brain swells and mashes itself against the inside of the skull. You did screaming with the worst headache of your life