At the beginning of a dodgeball game, the balls are lined up on the central dividing line. The players then simultaneously rush towards the center line and try to grab one of the dodgeballs and throw or roll it backwards to their teammates. In some versions there is a "check line" that the dodgeballs have to be behind before they can be considered "live." Players cannot pick up a ball and throw it instantly. This is known as the opening rush. Once the game has commenced, players throw balls at members of the opposing team in an attempt to eliminate the players.