Boeing is at the Farnborough Airshow this week — one of the biggest trade exhibitions for the worlds aircraft manufacturers — showing off the 787-9, a larger version of the Dreamliner thats going head-to-head with new offerings from European arch-rival Airbus. But when youre showing off an airliner to the men and women who are deciding whether to buy them, it turns out that a standard takeoff and landing demonstration wont cut it: the pilots throw these aircraft into extreme maneuvers designed to look impressive and convince airlines that theyre writing a check for a truly badass plane.