Experienced slackliner Joshua Leupolz attempted a dangerous slackline stunt above choppy waves in Nazare, Portugal.<br /><br />The footage shows Leupolz, 27, being hurled off his feet multiple times as he walks across a nylon slackline slung between two rocks.<br /><br />The filmed writes: ‘’I was shooting the surfing scene, the waves were very big, around 40-50 foot, very windy and cloudy and suddenly I saw a guy getting absolutely smashed by the waves in front of the cliff.<br /><br />''It was by far the craziest thing I've ever seen and documented.<br /><br />''I was really scared for him but at the same time really excited to see that with my own eyes.''<br /><br />The clip was filmed on December 15, 2017.
