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19 March 2014, 10:50
Andy Lewis walked the line 4000 above the ground.
The 27 year old daredevil walked across a 12 metre tightrope between two hot air balloons.
The slackliner, known as Sketchy Andy, broke the record above the Nevada Desert near Las Vegas.
"I will have a lot of self-doubt before I walk the line" said the American ahead of his stunt "but the nerves turned into excitement and the excitement turned into focus and I love walking when it's a challenge the most."
After the tightrope walk, parachute-wearing Lewis simply jumps off into the air and safely lands on the ground.
"The skydive was a release after the tension of the high line," he said. "Falling is so easy compared to high lining. It's like a victory dance."
Watch the incredible video above.