Okay. You are somewhere, at least in theory, between Butte and Mobile, going faster than sound in a long metal container that is not in physical contact with anything. A slight jiggling sensation at your prostate (if you have one) is, essentially, all that is holding you up 30,000 feet above something that looks like a badly distressed suede jacket, but is in fact the surface of the earth. You have been served a brown puddle with a lump in it, a rectangle of pale-yellow congealment, and some kind of mineral-based salad. There is a wheeeeengneeeenngn noise. The jiggle-at-the-prostate feeling gives way to a kind of giving-way sensation. You are swallowed by a cloud. Rule one: Maintain perspective.