WATCH: ‘Flying surfboard’ on the Thames

Watch as Olympian Amiee Fuller tests a ‘flying surfboard’ on the River Thames.

One of the newest extreme sports, Efoil surfing takes surfers above the waves on a motorised hydrofoil.

The two-time British Olympic snowboarder took to the River Thames to test one of the boards, which can reach speeds of up to 35mph, according to BBC News.

“I think crazy and cool is the best way to describe it. It’s like something from Back to the Future,” says Fuller.

Video and image courtesy of Tag Hauer