On November 22, 2025, Alexander Schulz set a new slackline world record: he crossed a slackline between two hot-air balloons at an altitude of 4,700 metres above Catalonia – the highest slackline ever walked above ground. After an 55-minute ascent with oxygen and two failed attempts without an oxygen mask, Alex managed to complete the walk on his last attempt, supported by his friends Niklas and Johannes in the basket of the hot air balloons.
=> You can watch the video and see photos of the event here on the project page!
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