Fair points. A lot of Wim's stuff seems to be geared towards the "if you don't exercise your 4 wheel drive once a month, it's probably not going to work so well when you actually need it" philosophy with the extreme temperature and breathing stuff. I'm prone to agree. I tried it a few times and it was interesting. I got pins and needles once in my orbital bones in my face and on the tip of my nose. Very cool experiences.