Sorry, but that fact is not relevant here. See many other postings regarding that in this story. Having a partial pressure of oxygen "equivalent to 10,000 feet" but with a "normal" atmospheric pressure, translates to an oxygen percentage of about 15%. The total atmospheric pressure at 10K ft. is 10.1 psi. Normal air at that altitude is still 21%, so things burn normally as you irrelevantly pointed out. Big whoop. Some people (especially young Navy kids) can function quite well at 10K ft. equivalent for quite a long time. (150 kPa O2 vs 210 kPa O2 partial pressure). Others will suffer the effects in the article you linked to. YMMV. But cigarettes won't stay lit in 15% O2 unless you're dragging really, really hard. Believe me, it works. Not that you would want to go through this experience for long though. Headaches were common, and the tobacco junkies quite unbearable. The A-gangers got the O2 generator working after a few miserable days. Go put yourself on the dink list, skimmer!