I took a mate in the sim who with the benefit of 500 hours constantly told me how easy my job is. He came very unstuck at FL410 M.86 just doing straight and level. A turn had me in hysterical laughter. He was very surprised at a demo of the difference between high speed stall and mach buffet, and how close they can be and how alike they feel.
But a Vulcan at m.84 and FL410, that earns large respect!
SND