((Does nobody read my theories? It makes no difference whether or not there is air pressure. The macromist tunnels existed in the void. The morgue macromist existed in the atmosphere.
Facts: The morgue door was hot and vibrating. Morgue rooms are usually cold. When the morgue door was made cold the mist ate through it. When Milno turned his suit temperature up, he started feeling better. The infected miners in the hangar were wearing suits, so their bodies remained warm and pressurized after their death, unlike their victims who were flash frozen.
Theory: The macromist is like a computer. It produces heat when it operates. If the heat gets too much the mist will hibernate while it waits for the heat to dissipate. The mist will also begin vibrating anti-organic vibrations when hot or threatened. If the heat is extreme the bonds between the mist particles will begin to break down and then the mist particles will be destroyed. If however you cool down a computer you can overclock it, tremendously increasing its speed. Thus when the mist is cool, it can reproduce at an astonishing rate.
And what happens when an HMRC member temporarily kicks the bucket? They are put in a stasis chamber, essentially a supercool fridge. And when did the first HMRC member kicked the bucket? At the end of the exploration of level 3 courtesy to a monorazor to the gut. And when did we lose contact with command? During the exploration of level 4. And why am I talking in question and answer form? I don't know, I must be going crazy.
The only thing this theory doesn't explain is why a mist that hates heat would take up residence in a human body and whys some people get infected while others don't. Perhaps it needs slaves or perhaps it needs bodies to eat in order to reproduce. Or maybe it's a bioweapon, meant to exterminate all life on a planet. We'll know when the scientists analyze it back on ship.
Oh, and the guy who lost his leg had his MKII immediately ampute it, so the infection may have not had a chance to move in. And all people have slightly different internal body temperatures or immune response so that may explain the differences in incubation time. Or, since the mist is psychic, it may have something to do with the way each person thinks.))
"Uh, Apone, I want you to lay down a suppressing fire with the incinerators and fall back by squads to the APC."
Fire my jury rigged flamethrower, first at the hole and then at the mist through the hole, with the intent of making a safe area around the hole. If the flamethrower is empty, refill it from the barrel of booze that should be somewhere on the elevator.