Skydancer - Indoor skydiving competition dance

They have Tunnel training courses all over the place in the States that you can join. They are kind of pricey though but if you are willing to drop a couple grand a year you could definitely get the training to do this.

What she is doing is actually ridiculously complicated.

First off every movement you do is backwards. Move your hand right you slide back and left to the left.

Secondly every part of your body now has the ability to move you. you can actually see her hands and feet being used to help her complete this in addition to her arms, and legs.

Most people have trouble just being upside down and staying still let alone spinning!