That's so funny that this thread showed up today. I was thinking about posting this topic when I was driving home from work this evening. Maybe it's a Portland thing.
Anyway, yep I think it's interesting too. Whenever I'm cold, and noone's around, my first instinct is to squat down, and wrap my arms tightly around my legs. When I was younger, I would fall asleep like this after I got out of the shower in the morning, sometimes tipped over, lying on my toes, arms and head. Strange.
Woah, that was weird...I just noticed I'm in that position now. But it's 4 am, gimme a break!
-Ozzy