My cousin, Sugar, thought it would be fun to hang onto Uncle Chris's foot and have him drag her around. This is an example of friction. Each time my uncle took a step, his force forward had to overcome the static friction between Sugar and the ground in order for him (or Sugar) to move anywhere. When he succeeded in dragging her, that meant he overcame the maximum static friction. Because Sugar is pretty light, it took less force for my uncle to overcome the maximum static friction than it would have if she was twenty pounds heavier. As Sugar was dragged across the ground, kinetic friction was involved since she was no longer at rest.