Hockey
Ice hockey has popularized the term "penalty box", and in most cases it is a small isolated bench surrounded by walls on all four sides, with the side facing the ice having the access door. There are typically two penalty boxes: one for each team. In ice hockey a period in the box occurs for all penalties unless circumstances call for an ejection or a penalty shot. If three or more players are serving penalties at once, the team will continue playing with three on the ice but will not be allowed to use the players in the box until their penalties expire.
Most leagues specify that a team cannot replace on the ice a member serving a minor (2-minute) penalty. This results in situations such as the power play, in which the opposing team outnumbers the penalized (shorthanded) team, and (in the event of coincidental minor penalties) situations in which both teams must skate with only five players (including the goaltender) on the ice.
If a team scores a goal while one or more of the opposing team is serving a non-coincidental minor penalty, the penalty with the least time remaining is canceled, and the player serving that penalty may return to the ice. In the case of a double-minor (4-minute) penalty, the penalty is treated as two consecutive 2-minute penalties. A triple-minor (6-minute) penalty is treated as three consecutive 2-minute penalties. If the opposing team scores, only the penalty currently being served is canceled; if more than two minutes remain, the penalty clock is reset to two minutes and the player must remain in the box; if less than two minutes remain, the entire penalty is canceled and the player is released. If the opposing team scores a goal on a triple-minor, like the double-minor, it is only the penalty currently being served that is canceled; if more than four minutes are remaining, the penalty time is reset to four minutes; if there are more than two minutes but less than four, the penalty time is reset to two minutes; and if there are two minutes or less remaining, the penalty ends. A major (5-minute) or misconduct (10-minute) penalty must be served in full, regardless of the number of goals scored by the opposition. To keep play fair, coincidental minor penalties ("matching minor" penalties assessed to both teams simultaneously) are also served in full regardless of scoring. Goaltenders never go to the penalty box, even though they are assessed penalty minutes. Any penalties enforced against goaltenders or the bench are served by a teammate, with many leagues requiring that teammate to have been on the ice when the penalty was taken.
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