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.

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

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.

A self-employed South African relocates to Ireland to pursue his dream of surfing giant waves in the Atlantic.

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

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

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

Filmmaker Andy Burgess and bodyboarder Hugo Pinheiro chase the origins of bodyboarding.

Andrew Cotton talks about the most controllable variable when surfing big waves: the equipment.

Most people choose to be a big wave surfer or have a desk job, but Ryan Seelbach has found a way to do both.

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