This move originated with the Charleston, as indicated by the swinging movement of the arms. Because there
is little movement in the legs, the movement of the knees needs to be exaggerated for extra visibility.
left side view
right side view
1. S:RL Start with the dancer's weight on their right foot. The dancer replaces their weight on their left foot with the right knee bent and pointed to the left, in front of the other leg, while pushing their left arm forward and swinging their right arm out to the side.
2. S:RR The dancer replaces their weight on their right foot with the left knee bent across the other leg, while pushing the right arm forward and swinging the left arm out to the side.