Richard Browning took off from the grassy stretch outside the Eden Project’s famed biomes on a beautiful late March morning, the engines roaring to life as they have every time he has flown one of these. This time, he was demonstrating the Jet Suit at Anthropy UK, a gathering of movers and shakers in Cornwall. As the creator of Gravity Industries and the suit’s chief pilot, he intended to give everyone a taste of what personal flight is like when the engines roar, movement is instinctive, and the crowd feels the blast of exhaust in their face.