11:19am MDT - 104K ft - The thing no one knows—and the main scientific finding—will be what happens to the human body when he goes supersonic, when he breaks the sound barrier. Will he feel a sonic boom? A pressure wave will build up as air molecules get smashed together in front of him. Technical director Art Thompson doesn’t think it’ll feel much different than regular skydiving because he’ll be breaking Mach speed at such a high altitude, where there’s negligible air density.
