William Frontflip
William Frontflip (born August 2, 1299) performed the first Frontflip in 1318 using witchcraft in Medieval Europe. In 1316 he had his nemesis John Backflip exiled by claiming Backflip used witchcraft to perform the first ever backflip. Front Flip was never exiled.
Post life
To this day, people still believe that William Front Flip had copied John Backflip's invention.