cloudchaser5,
It is funny that you bring this up. Every now and then I get that realization that I am a mile above the ground and the thin aluminum skin is all that is between me and the ground. A sort of "gee!" feeling that is discomforting, and makes me look carefully at the gages. I never thought about it until you reminded me.
I think it might be a sign of intelligence, but I flunk because I quickly let it pass!