So busy trying to be clever it ends up being stupid.

POTENTIAL SPOILER WARNING:

I suspect either someone with a huge IQ and too much time on their hands OR someone in the know has written those trivia items: see the spoilers.

Seems to me there's one thing putting "Easter Eggs" into films but those are so bizarre no normal viewer could ever be expected to see them. You're watching a film - a visual medium - not reading a book! This isn't supposed to be an Agatha Christie.

Also, the whole hypoxia plot was stretched beyond breaking point. The dials appear to are showing that he HAS available oxygen in the tanks - not the amount of breathable oxygen in the atmosphere. Normal air contains about 21% breathable oxygen - but that gauge is measuring 0-100%. (Full to empty?)

If we assume (and I didn't pay that much attention) that it was measuring oxygen in the air the 20ish percent would be about right and the pilot would not be hypoxic.

Assuming that's what it meant, hypoxia is observable from around 65%, but we're asked to believe that this guy is in a bad way. IF that gauge was measuring breathable oxygen, to be be hypoxic to that degree, the gauge would be 14% or lower. I believe the red line started about 20% and that the pilot referred to his oxygen reserves. So that doesn't add up regardless. If it were measuring relative breathable oxygen (where 100% is equal to 21% in the capsule's atmosphere) then at 20% the guy would already be a corpse.

That's a pretty important prop (and related dialogue) to get right.

Hypoxia does create a bunch of effects - loss of consciousness, brain damage and death if not reversed - but you can't really pick and choose which ones. Cyanosis (blue tint around the lips for example) wasn't apparent to me but I might have missed that.

Crucially though, even though the ground crew suggested he might be hypoxic the guy is able to hold a fairly normal, if emotional and confused, conversation. Our speech slurs and we star to sound drunk and sleepy as brain functions are suppressed. None of this is apparent. What we're presented with is a superbly qualified pilot who doesn't even seem to realise that he's hypoxic and despite being unable to screw in a lightbulb, is still able to wax lyrical about his wife back home. Also his demeanor or ability don't seem to change regardless of where his O2 supply is coming from.

My irk over those crazy clues in the spoilers might make more sense now. Someone, it seems, is trying to show us how clever they are with anagram's over Lottie's identity and yet fail to properly demonstrate one of the crucial lynchpins that the plot revolves around.