 Bong Sao, also known as the winged arm, is like this. Your wrist is at your centerline. Your fingers are pointing forward. Your hand is flipped over backwards. Your elbow is higher than your wrist. That's Bong Sao. On the dummy, you see it used like this. Often with the Wu Sao. Or with one hand, Bong Sao, like this. Or it can be a low Bong Sao. Like this. With your left hand, same thing. Bong Sao high like this. Or it can be a low Bong Sao.