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What?? CO2? Are you crazy? Better go with helium or nitrogen or some other inert, readily available gas. Rising CO2 concentration in you blood will trigger the suffocation panic reaction.(Air hunger - Wikipedia, the free encyclopedia)
Perhaps, in the strict sense of the word, painless, but certainly neither pleasant, nor dignified!
by someone (s0me1smail(a)gmail(d)com) on Fri Apr 3rd, 2009 at 12:56:42 PM EST
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