Good post scepti.
Apparently there's just under 5psi of pressure on the top of Mt Everest, we're told that people have survived up there, I haven't climbed Everest so I am just going along with what I have been told.
We do need oxygen to keep us breathing up there.
Let's assume people can survive up Everest. I don't believe it but for the sake of it let's accept that the height is legit and people have climbed it to the top.
Let's play with the 5 psi at the top as we are told.
A person getting to the top still has 5 psi crushing him, right?
It may not seem like much but it's 5 psi of pressure.
His suit is just a body heat suit. It's not a so called space suit. It's merely a loose suit and boots and hat gloves and whatever...you get the gist.
Let's go to so called space with the space suit on, like the Gemini carry on with Ed White, allegedly.
If he gets out of that space craft he is doing so with absolutely no pressure external to his space suit.
It would be like the Everest climber getting to the top in that space suit but the top of Everest has no psi of pressure at all. Zero.
As we can deduce, there is absolutely NOTHING pushing or squeezing against the so called astronaut from outside of his suit but inside it's inflated to 3.7 psi as we are led to believe.
This means that his suit is stopping that pressure from leaking out but also creating an equal and opposite reaction on his body and the suit material itself.
If you put a balloon inside a chamber and evacuate pressure, the balloon will expand to fill the void due to the molecules of air being allowed to decompress against the less pressure outside of it.
The more pressure evacuated the bigger the balloon gets, until it either bursts or the pump isn't strong enough to allow more evacuation....OR, the molecules inside the balloon simply cannot expand any more, or the balloon make up starts to be taken apart.
You get my drift, I'm sure.
Ok so back to the suit.
No matter what psi is in that suit, it is going to try and expand to fill the void of so called space vacuum.
The suit bladder can stretch like the balloon and the material of the suit can stop the expansion but the person inside of the suit will expand as well, meaning the suit becomes tighter and tighter until the person inside of it would be literally like a Michelin man...and I'm being mild here just for the sake of clarity.
The reality of a real near vacuum would be a breakdown in all material make up of everything that the space suit is and also what the person inside of it is.
Space as a fantasy for those that are into it, is fine b y me.
I'm just telling it from the reality side...the reality side that is does not exist in how we are shown and told about, especially with the silly astronaut spacewalk nonsense.
Now at the mild end of what I've said, the simple blatant in your face issue is, the so called astronaut is absolutely not going to be turning his head or moving about like he does. It just isn't or wouldn't happen....ever.