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I do not believe the link explanation is correct. The reason is that I am a pilot and at an altitude above 45,000 ft you have only 3-5 sec of consiousness. I have always been told that because of the lack of pressure, the oxygen actually is released through your skin thus rapidly depleting your available oxygen. I would think that in a almost absolute vacuum, this would be even more abrupt. This would be about like your blood boiling, but because of the low pressure it would boil at a temperature that is like normal body temperature or lower, which is difficult to understand. This can be shown by boiling water at high altitudes, where it will boil below 100 deg Celcious.
As for the oxygen leaving your skin, your skin would have to be able to hold in 14.7 psi which seemingly it could until you take into account that the oxygen is leaving on a nuclear level so it probably could permeate the skin and leave the body.
Maybe I've just been fed a bunch of crap though.
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