epa06207904 British professional highliner Sarah Rixham performs during the Highline Extreme event on the top of the Moleson peak at 2,000 meters above the sea level, in the Swiss Alps, near Fribourg, Switzerland, 15 September 2017 evening (issued 16 September 2017). A total of 25 of the world best slackliners compete until 17 September, on six different lines ranging from 45 metres to 350 metres. Balancing on the 'slackline' is a training method for climbers to improve their equilibrium sense. To avoid the danger of falling down, the athlete is secured with a rope. EPA/VALENTIN FLAURAUD