I'll read it, but the Russian expedition (Dyatlov Pass Incident) where everyone died is just as mysterious. Recently things settled down and I think they decided that one was a bad group reaction to an avalanche ( or potential avalanche). I think everyone here knows that lack of oxygen can do strange things to your brain and behavior.

en.wikipedia.org - Dyatlov Pass incident

I remember a time in California where I took my dog, climbed way up this mountain and took this little goat trail around and up rather than go strait up. After a bit I turned and realized I was above the tree line, and the goat trail was now just a ledge with a 100 foot drop below me. And I stopped because I was dead tired. I have acrophobia badly. So I had to work my way back around this ledge to be able to rest. Took a lot of concentration. I don't mountain climb because I'd be terrified all the time. :)