Ok question
The plane ascended to 45,000 ft then dropped to 25,000 ft-do I have that right?
At 45,000 ft, what would be the situation re hypoxia etc? Presumably the air pressure and therefore the oxygen content of the air would be much lower, meaning hypoxia was likely?
If so, could this have been a deliberate tactic-for good or not?
Is there any other function could causing a plane to rise to 45000 feet might have? I'm assuming it uses more fuel to fly at a higher altitude (or does it? presumably air resistance etc is less?)