Water element is about using inertia to keep the sack on a surface while moving...that is the snake style. After that if you crisscross body parts you fall in the monkey style. The hand sack is a skill toy, a game and a sport. It`s unique aspect is to use the back of the hands to toss and catch at first...after that, 1 rule only... no palms allowed. Performance by sebastien perron aka big dog