Awesome Rythmic Gymnast

So honestly, this might be the coolest thing that I have ever seen in my life.. like really? How do you even learn to do this kind of thing.. and it looks like it is a bowling ball, I don't know if they say what it is in the video because I had to watch it with the volume down.. but it's really cool. I couldn't even imagine how much time and work you would have to put into this to make it look as easy as she has.