Alex Stenzel, was one of the first to envision a handheld sail for wind-skating. He build this sail in 1974 at age nine.
Bloukrans Bridge Bungy is the world’s highest commercial bridge bunny at 216 metres (709 ft) above the Bloukrans River. https://en.wikipedia.org/wiki/Bloukrans_Bridge_Bungy
Surfing Hossegor, France
At age 16 Alex Stenzel plays 2nd highest Liga in Germany.