Juggling Theory??? As in mathematics??? Sounds strange? Well, get real. It´s pure and simple maths as well as physics (which is the mother of maths) you´re doing. It is not absolutely necessary to understand all of this, but it will help you to advance your juggling and to discover new tricks - as a solo juggler as well as a passer. Also, it will help you talk to other jugglers: most of them are nerds and they use lots of technical terms.