What Causes These Spinning Skirts?

There is a physics paper about this called whirling skirts and rotating cones. They say, steady, dihedrally symmetric patterns with sharp peaks may be observed on a spinning skirt lagging behind the material flow of the fabric. And i think it's partially that counter intuitive aspect that makes the skirts so interesting to watchth there's a soothing rhythm to how the skirts but they also seem to sort of defy physics. Are you watching an example? Im im picturing it in my head. Yes.