Table tennis is a sport in which two or four players hit a lightweight ball back and forth to each other with bats (also sometimes called racquets or paddles). The game takes place on a table divided by a net. Players must allow a ball played towards them only one bounce on their side of the table and must return it so that it bounces on the opponent's side. If the ball doesn't land on the opponent's side then it's a dead ball unless the other opponent hits the ball with their bat. Play is fast and demands quick reactions. A skilled player can impart spin to the ball, which makes its bounce and its reaction on the opponent's bat difficult to predict or return with confidence.