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what you may NOT do in TETHER BALL
Unintentional violations include the following:
Stepping off sides.
Touching the rope.
Carrying or throwing. When hitting a ball back against the direction from which it comes, the ball should bounce off the hands immediately, with no lingering contact. When hitting a ball that has passed the opponent and continuing it on its way, the ball still cannot be carried or thrown, but a less distinctive impact is to be expected. Serves must be hit, not thrown.
Double hitting may or may not be intentional, but we give the benefit of the doubt. A player can hit the ball only once per wrap around the pole, except if the ball hits the pole between hits. He could conceivably "dribble" the ball against the pole, but this would be of little advantage, because he would not gain any wraps, and his opponent would likely get an opportunity to steal the ball.