Just watching this might make your palms sweat.

A bunch of thrill seekers in Dubai recently leapt 1300 feet off the Princess Tower, which is known as the world’s second tallest residential-only building (next to 432 Park Avenue in New York).

The stunt dubbed “Dream Jump Dubai” was a collaboration between SkydiveDubai, XDubai and a Polish company called Dream World which has created a mechanism that allows you to “experience freefall without deploying a parachute.”

The DreamJump system uses multiple zip lines and a harness, and it lets you drop for a longer amount of time than you can with just a bungee cord.

“Bungee is just one rope. This has two, so it is safer and more comfortable,” the creator, Thomas Zielinski, told The National. “If you use bungee, the experience can be like giving birth. This is more like eating an ice cream.”

Only ice cream doesn’t come with the risk of ending up on the ground flattened like a pancake.

There were also about 558 terrifying base jumps off the platform over the course of 6 days.