Good question. Maybe manned flight? The idea of manned flight using aeroplanes was ridiculed in the beginning. The Wright brothers didn’t care and went ahead developing the technology anyway – just imagine the feeling they had when the plane lifted properly for the first time! How exciting it must have been? The insight they must have had about how their technology might affect the future? And how it must have felt to know they were the only people who could have this insight? And maybe more importantly, how it must have felt to proven all the people that doubted them wrong.