Last time I was on a plane the lady behind me notices the wing flexing out the window and asks me is that normal, I said that with metal fatigue that it could crack and fall off. Now mind you she has been praying the rosery since we boarded the plane, she asks me if the plane can fly with only one wing I told her I dont know can a bird? I think she passed out! Didnt hear from her for the rest of the flight.