Perhaps Steve Wozniak will give up his Segway now. Nine months ago it could only go about 2 feet off the ground, but now the Martin Jetpack can soar up to about 8,000 ft. A typical trip will last about 30 minutes at a speed up to 60mph. This is no simple toy for the curious, Due out later in the year, purchasing one of the first 10 will cost you $100,000.00, training included.