For juggling three balls, throwing behind the back is done by releasing the ball around the shoulder blade. Throw behind the back for juggling three balls with tips from a juggling enthusiast in this free video on hobbies.

Expert: Isaac Shivers
Bio: Isaac Shivers is a self-taught juggler whos been affiliated with the Harvard University Juggling Club and the MIT Sunday Juggling Club.
Filmmaker: Christian Munoz-Donoso