Wolfgang Siess Hang glides in Interlaken, Switzerland July 4, 2019April 14, 2020 Slater Harrison https://sciencetoymaker.org/wp-content/uploads/2020/04/Wolfgang-Siess-Facebook.mp4 Wolfgang Siess is the Co-Founder / Partner / Pilot at The Rhythm Of Flight Owner-Operator at Wolfifly Tandem Hang Gliding. The video is from his Facebook