The main page video is of someone running and leaping along a narrow path on a precipice. There is a significant risk that they could trip or slip and fall. Such a fall would not be survivable.
They are not risking a fall with some possibility of death (or perhaps just a grazed knee), they are risking certain death. You fall, you die.
I have no idea what George Carlin's rant against the term "self-help" has to do with this, but it was pretty funny. So, thanks?
I suspect that cliff side isn't as steep as it looks - the steepness is being exaggerated by the camera's fisheye lens. The path looks like the sort of ridge trail used by skiers in the winter.
Also, the path isn't that narrow, so the chance of tripping and falling off the path (especially assuming they already know the route) seems minimal.