Tales of things going very wrong

Ultrarunner Dylan Bowman recounts a mid-race encounter with “the world’s most vicious yellow lab".

Deep in the Yukon, a crew of mountain bikers are confronted by a family of grizzly bears.

Wingsuit BASE jumper Jeff Provenzano recalls the time he ended up landing 60ft off the ground in a tree.

Drop down the 50ft waterfall on a kayak in Maui with Poopies in this GoPro footage.

After a cliff fall shattered his legs, Kai Jones faces a harrowing rescue, surgery and fight for survival.

The Rio Cajones lives up to its name as the guys ride rapids and rappel rock walls in the canyon for two days.

Street Fighter player Snake Eyez learns about watersports from pro kayaker Rafa Ortiz.

After a cliff fall shattered his legs, Kai Jones faces a harrowing rescue, surgery and a fight for survival.

If there’s one thing Rush Sturges can say about himself, it’s that he’ll never stop paddling.

Comedian Zach Anner and his friends make an impossible trek to a cascading waterfall in West Virginia.

Things get crazy after the crew buy a kayak from craigslist to ride down a 50ft waterfall.

The filmmakers behind Calm in the Dark reveal the insane conditions in which they made the cave-diving film.

We follow mountaineer Andy Kirkpatrick on an 18-day, solo ascent of El Capitan, California.

Dane Jackson ventures to a kayaker's paradise in Veracruz, Mexico to chase some of the most challenging waterfalls in the world.

Pro surfer Mick Fanning and photographer Trevor Moran arrive in Norway to surf under the Aurora Borealis.

Crossing the Torres Strait is one of the riskiest journies on the ocean. Making a film about it, even more so.

One of the strongest climbers on earth must overcome his fear of heights in order to make bouldering history.