Physician here; have dealt with a few patients from scuba accidents (too rapid ascent). Basically, Jim's estimate and background reasoning is closest to accurate with regard to what would happen with spacesuit failure/rapid depressurization. Most critical issue has to due with the solubility of critical gases in the blood (i.e., nitrogen and oxygen). The oxygen/hemoglobin dissociation curve is greatly shifted in situations where ambient pressure changes rapidly;partial pressures and solubility of these critical gases just "can't keep pace" with the rapid change in ambient pressure. Blood doesn't actually "boil" per se, but rapid release of gases from the blood would have a similar effect. Rapid development of pulmonary edema and possible gas bubble embolism would be the killing event, likely within 45 seconds to a couple (2) minutes, max... Gruesome way to die but rapid loss of consciousness would ensue well before cardiopulmonary collapse.
Pipe would have a tight seal on the mouth.
For me, it looks like there is a chance that lungs will not fail in a matter of minutes and they have perhaps more time.
Wow, I didn't know that the movie of the incident exists!
Actually, the scene in 2001: A Space Odyssey where the astronaut "transfers" from the pod bay door in an unpressurized state is possibly one of the more accurate portrayals in the whole movie. If my memory serves, he's exposed to vacuum for a very brief period of time. The bigger question is whether the vestibule he wound up in could have repressurized so quickly... A more accurate presentation would have at least given him bleeding tympanic membranes and likely very red eyes from rupture of scleral blood vessels!
"Is EVA without space suit possible?"Answer is 100% yes...you can (you could put a human in space without pressurization) The real question is will you remember it?Answer is 100%....NO....you would be dead quit quickly
Hot water bottles are tested to 14 kpa. And I suspect the pressure to inflate is generated by palate, cheeks and lips, not lungs. Lungs can't handle enough pressure differential.
Physician here; have dealt with a few patients from scuba accidents (too rapid ascent).