Danny MacAskill's Great Grandfather? Bicycle Tricks from the 1950's
Harry Kramer was way ahead of Youtube, Danny Mac and any BMX flatland inventors with his crazy bicycle and unicycle stunts.
His broken-headset-fork-and-front-wheel-flinger #bhffwf is a signature move that has fallen out fashion since the invention of the threadless headset and our highly litigious modern society. Maybe it's time for a come back?