Slovak daredevil David Andreev, also known as “speedflying kid,” races down the Austrian Alps, following a river only inches away from the ground and treetops.

The footage, shot on September 15 at Volderau, shows Andreev performing a barrel roll at a dizzying speed and finishing his flight with a safe landing.

Tim Konrad is the founder of Unofficial Networks and a passionate skier with over two decades of experience in the ski industry. In 2006, he launched the blog from Lake Tahoe with his brother John, evolving...