thrown by an opposing player Crossing over the center line or (in seasons one and two) stepping outside the boundary There are also two ways of returning to the game after being eliminated. The first, as previously mentioned, is if a player catches a ball. At this point, one of their teammates can come back onto the court, until five members are on the court. The second way is called a regeneration. In the first season, if all but one member of the team were eliminated, the last player had the opportunity to hit a target aptly named the "regeneration target" and, if this was accomplished before he was eliminated, all of his teammates returned to the court. In season two, the last player on the court only had to stay alive for 20 seconds, which would regenerate the entire team. In both cases, a team could only regenerate once per round. Lastly, in the third season, this rule was changed again. If the last player standing is able to not be eliminated for 30 seconds, only one of his teammates can return, but if the last player is eliminated, four team members return to the game. However, this could be done an unlimited number of times. Other rule changes and amendments For the second season, there were two more main changes. Firstly, there was a 5-second delay of game warning. If a team held more than one ball for over 5 seconds, one of its players would be out. The second rule stated that if a player, in the opinion of the referee, was impeding the flow of play of the game by stalling, refusing to throw the ball, or attempting to force a play on the opposing team, the referee(s) could give that player a "yellow card". Two yellow cards meant that the player in question was ejected. This second rule was introduced in the early stages of the second season and is called the "Benedetto Amendment" after player David Benedetto, when he deliberately placed two balls immediately on his opponents' side of the court, forcing the opponents - in compliance with the above-stated five-second-rule - to approach the balls, allowing Benedetto to hit them at point blank range, a tactic which was deemed unfair by the show's producers. Although Michael 'Handsome' Constanza originally used the tactics in Episode 1 of Season 1, there was no five-second rule