Figuring out a way to get a skate park to float more than 2,000 ft (610 meters) up in the air is quite difficult, it turns out. So when Scottish BMX rider Kriss Kyle sought to do just that, he turned to the experts at the Red Bull F1 team.

The goal was to create a skate park that was light enough to fit under a hot air balloon, so that Kyle could ride his BMX bike at altitude. Together, they came up with a carbon fiber skate bowl that would not only be made of the same composite as the F1 car, but would utilize the team’s aerodynamic expertise to ensure that it would be stable in the sky.

Despite utilizing some of the world’s most advanced materials, the BMX bowl still wound up weighing 1.7 tons. That, in addition to the two bikes, and the team of people who would be riding along with Kyle providing support, meant that one of the world’s largest hot air balloons had to be created for the stunt.

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Photos Red Bull

Six times larger than average, it was created by Cameroon Balloons. In addition to being able to support the weight of its load, it also had to deal with an unusual combination of high atmospheric pressure, cold and dry conditions, and wind speeds of around 3 mph (5 km/h).

But it all came together in the end and, in a recently published video, the balloon, the BMX bowl, and Kyle can all be seen rising above the U.K. countryside. Unfortunately, that meant that Kyle was forced to confront the fact that he’s actually afraid of heights.

“I’ve been dreaming of this project for so long, but the height factor has always felt like a massive weight on my mind,” he said. “I’ve had to push past my fears several times before on Red Bull projects, but nothing has compared to this. Having to climb over the edge of the basket to get down to the skate park underneath was such a crazy experience.”

However, he said that at a final height of 2,100 ft (640 meters), he was simply so high that it didn’t feel real anymore. Able to utilize his unique riding style to take advantage of the BMX bowl’s tight proportions, Kyle can be seen doing backflips, front flips, and 360s, all where you’d be more likely to find an eagle than a BMX rider.

Even after getting up into the air, reaching cruising altitude, being lowered into the bowl, performing tricks, not falling off the side (he was equipped with a parachute), and getting back into the basket, Kyle and his team still had to face the terrifying ordeal of landing with a 1.7 ton skate park under the balloon – something that has never happened before, and which looks tremendously uncomfortable.