One of my other hobbies is kite flying, especially dual-line and quad-line sport kites, which allow the flier to control the direction of the kite’s flight. Some of my friends in the kite world recently made a really cool video, with the help of a video camera mounted on a radio-controlled quad-rotor helicopter. What you’ll see are members of a kite performance team, flying quad-line sport kites (two lines controlled by each hand with the aid of a handle). Enjoy!