Guillaume Rolland of France stands on the line during the Highline Extreme event in Moleson, Switzerland September 25, 2015. European best slackliners will compete until Sunday on six different lines ranging from 45 metres (148 ft) to 495 metres (1,624 ft). The 495 metres (1,624 ft) line if completed, will be the world record. (Photo by Denis Balibouse/Reuters)





Guillaume Rolland of France walks on the line during the Highline Extreme event in Moleson, Switzerland September 25, 2015. (Photo by Denis Balibouse/Reuters)





Oliver Ross of Austria walks blindfolded on the line during the Highline Extreme event in Moleson, Switzerland September 25, 2015. (Photo by Denis Balibouse/Reuters)





Alex Schultz of Germany (L) and Samuel Volery of Switzerland walk on lines during the Highline Extreme event in Moleson, Switzerland September 25, 2015. (Photo by Denis Balibouse/Reuters)





Competitors stand on lines during the Highline Extreme event in Moleson, Switzerland September 25, 2015. (Photo by Denis Balibouse/Reuters)





Alex Schultz of Germany walk on a line during the Highline Extreme event in Moleson, Switzerland September 25, 2015. (Photo by Denis Balibouse/Reuters)





Samuel Volery of Switzerland falls on the 495-metre (1,624 ft) line during the Highline Extreme event in Moleson, Switzerland September 25, 2015. (Photo by Denis Balibouse/Reuters)





Friedi Kuehni of Germany walks on the line during the Highline Extreme event in Moleson, Switzerland September 25, 2015. (Photo by Denis Balibouse/Reuters)





Samuel Volery of Switzerland walks on the 495-metre (1,624 ft) line during the Highline Extreme event in Moleson, Switzerland September 25, 2015. (Photo by Denis Balibouse/Reuters)





Competitors stand on lines during the Highline Extreme event in Moleson, Switzerland September 25, 2015. (Photo by Denis Balibouse/Reuters)





Samuel Volery, a professional mountaineer, balances on the 'highline' during the Highline Extreme event on the top of the Moleson mountain at 2,000 meters above the sea level, in the Swiss Alps, near Fribourg, Switzerland, 26 September 2015. Balancing on the 'slackline' is a popular training method for climbers to improve their equilibrium sense. Other than balancing on the 'slackline' which is in a low distance to the ground, balancing on the 'highline' is a more extreme thrill, because it is done in dangerous altitudes. To avoid the danger of falling down, the athlete is secured with a rope. (Photo by Jean-Christophe Bott/EPA)