We humans also have a center of mass.

Try balancing a broom by holding it and slowly bringing your hands together until they meet.This balancing point lies right underneath the broom's center of mass.We humans also have a center of mass.When most people stand up,their center of mass is around the belly,but what happens to your center of mass when you lift your hands in the air?Your center of mass moves upwards.It moves all the time as you move through the day,based on how your body is positioned.It can even move outside of your body.When you bend forward, your center of mass is located below your bent belly in a place where there is no mass at all.Weird to think about, but that's the average position of all your mass. Many objects' center of mass are outside their bodies.Think of doughnuts or boomerangs.