Professional kayaker Adrian Mattern descends down a huge 90ft waterfall in Oregon.<br /><br />Filmed on April 12, Mattern with a GoPro strapped to his head edges towards the water's edge before plunging down the 90ft drop.<br /><br />Another angle, filmed by a drone, shows the sheer height of the Abiqua Falls as the German daredevil drops down the waterfall.<br /><br />Mattern is renown for undertaking various stunts on his kayak such as racing down a storm drain in Norway at 50mph.
