HOW DOES SHE STAY STANDING?

Something puzzles me about this. All those rings must have sufficient weight to maintain the momentum that keeps them spinning. Yet, if they are too heavy, they might exert enough centrifugal force to pull the performer off balance. One hula hoop is no big deal, but scores of them? The audience didn't get to examine the materials.           

Hoops Time

It's time for our college basketball playoffs to start. In fact, I think the first games are right about now. The tournament has 64 teams in a single elimination format. My school, St. Louis University, usually has a so-so team but they made into the big event this year. Wonder how long they will last. 

Or you could do other hoops. The one in this picture looks like a hula hoop to me but the color and motion are all that count.