The Skyliners are a group of friends pushing their limits by combining BASE jumping with highlining — a vertiginous mix of climbing, slacklining and tightrope walking. This is the trailer for the feature documentary “I Believe I Can Fly (Flight of the Frenchies)” by Sebastien Montaz-Rosset. I can’t wait to see the full documentary. Stunning work Sebastien. C’est magnifique!