SkyDiver Cheryl Stearns, is making plans for a 130,000 foot jump from the stratosphere.
"My maximum free-fall speed will be around 1150 kilometres per hour, though because of the thinness of the atmosphere it will feel like only 4 kilometres per hour. The speed I reach will depend on my body position on the way down. If I go into a head-down dive I could go much faster, and I may reach a speed of Mach 1.3. I don't know whether I will create a sonic boom."