Totally agree, being smashed by the wheel sounds dangerous.
The lack of oxygen for a long period though can have severe consequences or even kill someone.
That is at least in the mountain where you need more oxygen as you are moving but staying few hours in any condition at 30-40k feet still does seem a problem to me.
30-40k ft is absolutely a problem. Even if you remain conscious, you're completely unable to think coherently and generally have no idea what you're doing. Stay there long enough and you will unquestionably suffer brain damage and probably death as well.
SmarterEveryDay did a good video about hypoxia training that demonstrates the very rapid onset and severe effects of hypoxia at cruising altitudes: https://www.youtube.com/watch?v=kUfF2MTnqAw
There's a reason why it's called the Death Zone (26k feet). And people that go up there acclimate for days or weeks, often with oxygen tanks anyways. And this plane story is likely going from sea level instantly to 40K.
The lack of oxygen for a long period though can have severe consequences or even kill someone.
That is at least in the mountain where you need more oxygen as you are moving but staying few hours in any condition at 30-40k feet still does seem a problem to me.
https://climbtallpeaks.com/how-high-can-you-climb-before-you...