How does cheerleading and physics relate?

In Cheerleading, many stunts involve kinetic friction. For example, take the basket toss. When I flier falls back into their basket, their is a kinetic friction between her and the arms catching her. This, along with the distribution of their downward force through the catchers, helps slow the flier to a stop. Another example is in coed partner stunts. When the base tosses his flier, there must be kinetic friction between the the two (on hands, wrists and waist) especially during the flick.