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Samuel Volery, a professional mountaineer, balances on the "highline" during the Highline Extreme event on the top of the Moleson mountain at 2000 meters above the sea level, in the Swiss Alps, near Fribourg, Switzerland, Saturday, September 26, 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. (KEYSTONE/Jean-Christophe Bott)