The most unrealistic part about humans in space is that the average human knows why their body reacts the way it does.
Dont get me wrong, i love how they explain things that shock an alien, but most humans, atleast americans, do not know what happens to make their foot fall asleep.
They know that if you keep it in one place too long it will, but not that if you sit on it too long the nerves get compressed and cuts off from your brain for a couple minutes.
Of course if you went through a program that required you to know things about humans that could be potentially dangerous to other life forms then you may know things, but after a couple years or so when there isn’t a requirement to do that because of trade with other species, i like to think that something like this happens.
Human: *sitting in a chair with one leg over the other, listening to their xorgog friend talk*
Xorgog: -and so I never got to eat my special tsu’le cake. Oh look at the time, I better head to my pod.
Human: Oh dang, lemme walk you out then bud! *goes to stand up only to fall back in the chair* Agh! Dammit!
Xorgog: *worried* What! What happened?
Human: *waving him off* it’s fine, my foot just fell asleep. Just give me a second and i can get up.
Xorgog: *confused af* what do you mean ‘fell asleep’? I thought you were one organism, not multiple?
Human: Oh, well when humans have their limbs in one place too long, when you go to move it gets numb.
Xorgog: *horrified* How?!
Human: *shrugs as he shakes his leg* I dunno man! It’s fine though, i just gotta shake it to wake up and it’ll have a tingly feeling, which hurts like a bitch, then it’ll be back to normal. No biggie.
Xorgog: ….humans are weirdly terrifying.
Human: *shrug* whatever you say man.
