In addition to the truth in Ta in obstetrics. There are also people who by foot another nation"s Vietnam. I have ever seen in the Saigon river. But to sit down on the ground and foot pedal boat oar. Which is applicable to small boats. Because have the strength to stand sitting less than As people in low stand on the ship with one leg. The legs and feet on the other side whip paddle. The ship was driven away. How big The unique abilities. Though not nobody imitators, difficult to be reproduced. Just because the balance body standing on one leg on the boat was badly. But people in TA can fluently. As the middle water ballet. "In Da fo." that means the sea son lake