“This isn’t fake, I promise,” said filmmaker Casey Neistat as he announced the impending debut of his ‘Human Flying Drone Holiday Movie’ on Twitter with a dubious-looking graphic. Anyone who saw that tweet could be forgiven for their skepticism, especially since Neistat was teaming up with fellow YouTube star Jesse Wellens of the channel PrankvsPrank to pull off the stunt. But by all accounts, this footage of the ‘world’s largest homemade drone’ is real, and a Santa-suited Neistat is actually flying 25 feet in the air.

Human Flying Drone Holiday movie coming very very soon. this isn’t fake, i promise. shot on my #gear360 – https://t.co/8gWQRKyh2o pic.twitter.com/QN06Kq8NFm

— Casey Neistat (@Casey) December 18, 2016

No one in the world sells a drone that can lift a human being, so Neistat and his team set out to create one. The octocopter drone, which is augmented with a Samsung Galaxy Gear 360 action camera, reportedly took over a year to build, and the video clip was shot at a ski resort in Finland over the course of four days. In it, the daredevil YouTuber zooms down a slope on a snowboard and then takes off into the sky, going higher and higher before the final jump takes him 100 feet into the air, as smoke bombs fastened to his feet emit vivid pink plumes.

One thing that’s not quite what it seems is Neistat’s single-handed grip on the handle: he’s actually securely fastened to the drone, dubbed ‘Janet,’ by a body harness. The rest of it, as far as anyone can tell, is legit. Looks like fun! Check out how it’s done in the behind-the-scenes video above.

If you saw human figures zooming through the sky – just flying on their own, with no parachutes or jet packs apparent – what would go through your mind? Would you think you were losing it? Believe that superheroes really do exist? Fear that it was part of some kind of bizarre terrorist attack, give the location near the Statue of Liberty in New York City?

The Manhattanites who witnessed the display of flying people might have thought any one of those things. Or, they might have realized that the figures aren’t real, and that they must be part of some kind of art project.

In fact, they’re human-shaped RC planes, and the stunt is a viral marketing effort for the upcoming superhero movie, ‘Chronicle.’ Marketing or not, the video is incredible, and it would have been amazing to see it in person.