Felix Baumgartner, an intrepid skydiver from Austria, is aiming to copy Superman - and become the first man to go supersonic.
Baumgartner has jumped from planes, skyscrapers, and even a pitch black cave in Croatia.
In his most spectacular and dangerous jump yet, he floated 21km above the earth in a pressurised capsule before plunging down from the edge of space.
In a few months time, Baumgartner plans to free fall from almost twice as high - 37km.
And NASA engineers plan to follow his attempt in the hope the feat could give them ideas to develop new escape hatches for their astronauts.
Al Jazeera's Mereana Hond reports.