I got a chance to board a KC-135 tanker at an air show and it was a terrifying experience for me. every step taken toward the rear of the plane, the whole damn thing creaked, cracked, groaned and shook. Structurally, it felt like it was about 40% less sturdy than a mobile home assembled with elmer's glue and paper staples. Then the idea hit me that this plane was THAT shaky, yet was a flying gas station. and someone has to look down out the rear (about 40,000 feet to the ground) and still fill the flyboys up. My dad used to tell me stories about riding in C-130s that shook so bad he carried a ratchet in his pocket- to tighten the loose bolts- or make him feel better about flying in them. used to laugh at him for that. but after that experience, i don't think i can. My question is, how the hell do ya do it? How do you get on a plane designed to be as light as possible, to carry the most flammable of cargo, and do it every day? without going nuts?