Video: Slackliners Cross a Line Between Two Frozen Waterfalls

Slacklining is one of those activities that only continues to grow in popularity, with top athletes pushing the boundaries of what we think is possible. Case in point, in this video two slacliners – Lukas Irmler and Pablo Signoret – set up their line between two frozen waterfalls in the Alps and then proceed to walk across. As you'll see, they aren't a short distance above the ground either, instead walking out into open space hundreds of feet up. Don't try this one at home folks.