"Incidentally, it is a myth that you have to bend over to expel the dense sulfur hexafluoride gas. Your lungs are more than capable of breathing it out without any exotic posturing. Neither helium nor sulfur hexafluoride is toxic, but both can make you lightheaded from breathing them instead of air with oxygen, so use common sense. Don't keep breathing either gas. Exhale after breathing them, then take a deep breath of regular air. Have fun, but be safe!" [via]posted by TechnoLustLuddite at 9:00 AM on October 15, 2008
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posted by Jofus at 5:33 AM on October 15, 2008