"Squat! Squat! Squat! Higher! Faster!"
In the basement of the Duane Physics and Astrophysics building at the University of Colorado Boulder, a science demonstration is going on, but it looks more like a vaudeville act.
One by one, students balance precariously on a rotating platform. Then they are handed what looks like a spinning bicycle wheel, holding it by two handles that stick out from either side of what would be the hub of the wheel. When you flip the wheel over, like a pizza, your body starts rotating in the opposite direction.