JOHN TIERNEY REPORTS: “Fearless Felix” Baumgartner To Try To Become First Sky Diver To Break Sound Barrier. “Felix Baumgartner, a professional daredevil, plans to step off a balloon-borne capsule 22 miles above Earth on Tuesday morning and plummet for five and a half minutes until opening his parachute a mile above the New Mexico desert. If all goes as planned, he will do a series of barrel rolls in the near-vacuum of the stratosphere and then plunge headfirst at more than 700 miles per hour, becoming the first sky diver to break the sound barrier.”