Raw footage: Daredevils walk tightrope to cross Victoria Falls in Zimbabwe

Two European daredevils walked across Zimbabwe's world famous Victoria Falls on Saturday, crossing the gorge by walking across a stretch of rope. Lukas Irmler, a 26-year old chemistry student from Freising, Germany, and Reinhard Kleindl, a 34-year old science journalist and crime author, from Graz, Austria, practise a sport known as slacklining, and rank among the world's best. Slacklining is a derivative of tightrope walking but involves a loose rope that slouches under the walker's weight. The men are harnessed onto a safety rope to catch them if they fall off.