> By that time, your real problem is simply that you've stopped breathing, which turns out to be a big deal. A really hypothetical scenario: but suppose for a

> By that time, your real problem is simply that you've stopped breathing, which turns out to be a big deal. A really hypothetical scenario: but suppose for a moment an astronaut's is floating around, the suit has ripped open, oxygen within it is pretty much at nil, and unable to return in time. Would it be possible to bring a breathing apparatus(i.e. small oxygen tank) out to the astronaut to keep him/her breathing a bit longer?