Why are you saying that the handmaid couldn't breathe in space? She had conditional immortality (from LE) and then fought against the condensce where she lost her immortality and was killed.
I would say according to what you are holding while getting prototyped it could count as one. For example Dave prototyped a bird who was impaled by sword. Jack could use that sword later to attack people. So if you are holding a weapon while prototyping yourself the weapon would probably get prototyped too, but wouldnt count as an extra prototyping.