So my first question - what happens to a human body in a vacuum.
A human in a vacuum will lose consciousness after a few seconds and die of hypoxia within a few minutes. Blood and other bodily fluids will boil (a condition known as ebullism) the body may swell up to two times it's normal size. Rapid evaporative cooling of the skin will create frost, particularly in the mouth.
Hypoxia - a condition where the body (generalized hypoxia) or a region of the body (tissue hypoxia) is deprived of adequate oxygen.
Ebullism - The formation of gas bubbles in bodily fluids due to reduced environmental pressure.