Here's a heart-stopping stunt from a daredevil biker who braves a near vertical drop on a dam in Slovenia.
The footage, caught on a GoPro camera, captures rider Primož Ravnik gingerly standing up on his pedals and then rapidly descending down the nearly 200-foot drop.
Within moments, the fearless biker is speeding down a virtually vertical slope heading towards the water below.
The death-defying stunt is part of a competition being run by GoPro and biking website Pinkbike to find the best stunt video, with a top prize of $20,000.
The video has had more than two million views on Youtube.