Effects of being briefly exposed to a zero air pressure environment
Assume that a person is shielded by magic. The only thing this magic does is to keep air away from that person (ignore for now any consequences to said unfortunate individual). Aside from this, the magic can be ignored. This has the result that the person is encased in a sheath of empty space, about 2-1 inches thick. Nothing, including air pressure, is in this area.
What would happen if someone put their hand in this sheath of empty space? Based on what I know (and have seen in the movies), I believe some form of rupturing of the skin would take place, but I don't know how severe this would be. I also don't know if it would happen immediately, or if the hand could potentially be unharmed, at least for a time.
Along the same lines, what would happen if an entire person was exposed to such an environment?
P.S. While the tag 'atmosphere' may not exactly be appropriate, there was an extreme lack of appropriate tags, and I figured those following 'atmosphere' would be able to answer the question.
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