Sometimes seeing is believing. Other times what we see is so incredible as to seem unbelievable. When filmmaker Devin Graham uploaded a video to YouTube on 17 July 2018 showing a man flying through the air in speeds in excess of 100 MPH thanks to a jet engine strapped to his feet, many viewers took to YouTube's comments section to claim that the footage was fake:
Although the video may appear to be presenting something that exists only in the realm of sci-fi, it does capture a genuine stunt performed on a real device capable of propelling a man through the air.
The man featured in this video is Franky Zapata, the inventor of the Flyboard Air, which is billed on his company's website as a "jet powered personal aerial vehicle":
The FAQ section of the Flyboard Air web site explains some of the capabilities and limitations of the device. For instance, this jet-powered howeverboard can only travel for about 6-10 minutes before running out of fuel (which is carried in backpack worn by the rider). It runs on Kerosene/Jet B fuel, generates about 110-115 db when in operation, and has a max speed of about 85 mph (more on that later).
Videos of Zapata on one of his flying devices (he also makes a water-based product called a Flyride) frequently draw accusations of footage forgery from skeptical viewers, but Zapata's exploits have been well-documented. Not only are these products available to rent at locations around the world, but Zapata has showcased the Flyboard Air on a variety of programs such as "France's Got Talent," and he even earned a Guinness World Record in April 2016 for "farthest hoverboard flight":
