SportsTop slacklinerTo view this video please enable JavaScript, and consider upgrading to a web browser that supports HTML5 videoSports06/21/2015June 21, 2015Germany's Alexander Schulz is one of the best slackliners in the world. He's constantly testing the limits of this young sport. The 24-year-old currently holds the world record in waterline, highline and longline.https://p.dw.com/p/1Fk3tAdvertisement