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Don't look down!
This is the moment a daredevil takes a few firm steps and hurls himself into the abyss off the edge of a cliff.
Stomach-churning video captures the moment he leaps from the 800ft cliff and plummets towards the earth with nothing more than a single rope to keep him from falling to his death.
Ryan Jenks, a 33-year-old painting contractor is a fan of rope jumping - that's leaping off a cliff, but while attached to a highline rope safety system.
Though it might seem crazy, it's not something he takes lightly.
He'd been planning this jump for over a year, after deciding that this spot in Yosemite National Park was perfect.