On Thu, Dec 2, 2010 at 2:17 AM, Reinhold Metzger <reinholdmetzger at cox.net> wrote: > Some years ago a hiker died in his sleep on top of Mount Langley in a > non breathable sleeping bag zipped closed all the way without sufficient > ventilation. You mean I should't stick my head inside a plastic bag and seal it around my neck? Duh...