WASHINGTON — Even if you’re sitting in a safe chair, you may have trouble looking at this: A team of complete lunatics — no, wait — a team of extreme jumpers recently hurled themselves off the Princess Tower, in Dubai, the world’s second-tallest residential building.

It was all part of a Dream Jump event in which people jumped off a perfectly good platform about 400 meters in the air — that’s about 1,300 feet — 558 times in a few days.

Of course, they took video — why do it otherwise? Odds are you’ll grab onto the arms of your chair at least once before it’s through:

h/t Time.com