Daredevil Andy Lewis walked a 39-foot slackline between two balloons that were 4000 feet above the Nevada desert back in March.
Lewis wore a GoPro camera on his helmet to record his amazing feat (video below) without a safety line, notes Towleroad.com.
According to the Daily Mail, Lewis set a world's record by walking the world's highest slackline, which is a piece of stretchable fabric, in less than 20 seconds.
The previous record for slacklining was 3,000 feet.
The only safety feature that Lewis had was a parachute strapped to his back, which he used after the historic walk.
Lewis and his team reportedly did trial runs from 6-10 feet to 600-700 feet before attempting the 4,000-foot walk.
Lewis, who is nicknamed "Stretchy Andy," said after the stunt, "It felt amazing to be on the line, it was very free and incredibly exposed."
Sources: Daily Mail, Towleroad.com