Earlier today, guy rode a balloon to an altitude of 128,000 feet, just over 24 miles above the earth's surface. He jumped after the two and a half hour ascent to free fall back to earth. It took 48 seconds for him to reach Mach 1, breaking the sound barrier. Top speed reached during his free fall was estimated to be 834 MPH. Very cool.

Link to you tube video: http://www.youtube.com/watch?v=8Oq2Xl7oiws