French speedrider Delluc Valentin warns that the runs he undertakes require rigorous training and great mastery of his sport. Watch one of his videos and it won’t be long until you are convinced of his honesty. This run took place at Le Brévent mountain in Chamonix, France and the amount of time Delluc spends airborne will be enough to make some queasy viewers nervous. Never fear however; he does land on his feet. Credit: YouTube/Delluc .Valentin