The trav­el­ing French troupe that brought us the incred­i­ble I Believe I Can Fly (Flight of the Frenchies) video are back at it, push­ing the lim­its once again. This time they are attempt­ing to slack­line between two hot air bal­loons. Equipped with noth­ing more than a BASE jumpers para­chute rig on their backs, the Sky­lin­ers step unteth­ered onto the high­line with noth­ing but thou­sands of feet of air beneath them and the French coun­try­side below. A fall means a quick lunge for the line, and if they don’t grab hold then they fall out of sight and into the clouds. With their cus­tom­ary sense of humor and zany antics, it’s easy to think of these guys as a bunch of jok­ers, but don’t be fooled. They are a team of high­ly expe­ri­enced moun­taineers, BASE jumpers, and slack­lin­ers that are uni­fied by the pas­sion to infuse extreme sports with their unmis­tak­able creativity.