the action of drawing a circle with feathers or paper. Sa-sa (사사): It is also called yangsa. It means two-sided motion. It is a technique that turns the jin-ja twice. performer (chi-bae) looks first from the left and turns. Butterfly-sa (나비사): It was named because it resembled a butterfly. While doing 'sa-sa', performer raises head from the fourth beat and shoots a vertex. References Korean headgear