For most adventurers, reaching the summit of Mount Everest is the ultimate achievement, but for Joby Ogwyn it will be the starting point.
After scaling the world's tallest mountain he intends to jump off it and fly to the ground wearing a nylon wing-suit.
The death-defying stunt will be broadcast live across the globe on the Discovery Channel in May, when viewers will see Ogwyn say a quick prayer, take a few sucks from an oxygen mask, and throw himself into the void.
"I wish I had a nickel for every time I've heard I'm crazy," Ogwyn said, moments after streaking across the California sky like Superman in a test flight of his wing-suit, a nylon jumpsuit with webbing between legs and arms.
"But there's a lot more to this than a crazy person jumping. It will be very well executed. It's like a shuttle mission in some ways. This is what I dreamed about as a little kid. Everything I've done for the last 20 years has been practice for this and now the technology has made flight possible.
"I believe it will be one of the most exciting adventures in the world and I want people to see it. Sure, I'm very scared. But I'm not afraid to die."
Within the rarified worlds of mountain climbing and extreme skydiving, Ogwyn (39) is already a legend. If anyone can jump safely off a mountain, he can.
In 2008 he climbed Everest in just nine and a half hours, when it usually takes at least three days.
A 40-strong back-up team will accompany Ogwyn to base camp at 17,800ft, and four high altitude cameramen will join him on the three-day trek to the 29,035 ft summit. (©Daily Telegraph, London)