Touchdown celebration

In gridiron football, touchdown celebrations are sometimes performed after the scoring of a touchdown. Individual celebrations have become increasingly complex over time, from simple "spiking" of the football in decades past to the elaborately choreographed displays of the current era.
Taunting and celebration are both offenses in the National Football League (NFL); as a result, gaudy displays are often frowned upon. If the league views the act as highly offensive, large fines and even suspensions can be issued. In 2006 the NFL, in an effort to cut down on celebrations, amended its rules to include an automatic 15-yard penalty against any player who left his feet or uses a prop, like a towel, the goal post or post base or more specifically the football. The penalty was called as "excessive celebration", and the yardage was charged against the offending player's team when that team kicked off to the opposing team. The excessive celebration rule was severely scaled back in 2017; penalties for excessive celebration will henceforth only be called for using the goalposts as a prop (to avoid inadvertently warping the goalposts out of place), lewd or violent gestures, or prolonged celebrations intended to delay the game. Other restrictions still in place include the usage of outside props and any person not on the active roster for that game leaving the team box to celebrate (including inactive players or coaches); the penalty was also revised in 2019 to give the defensive team the option of enforcing the penalty on the extra point attempt, which could potentially push an extra point kick out to 48 yards and make it far less certain to be converted.
Simply "spiking" the ball is not interpreted as excessive celebration unless the ball is spiked towards another player on the opposing team. Jumping onto the outer wall to accept contact from fans, such as the Lambeau Leap, is also not considered such, as it is off the field of play.
College football, governed by the NCAA also penalizes excessive celebrations with a 15-yard penalty. NCAA Football Rule 9-2, Article 1(a)(1)(d) prohibits "Any delayed, excessive, prolonged or choreographed act by which a player (or players) attempts to focus attention upon himself (or themselves)"; in addition, Rule 9-2, Article 1(a)(2) asserts that "After a score or any other play, the player in possession immediately must return the ball to an official or leave it near the dead-ball spot." Additionally, if a player's actions are considered "unsportsmanlike conduct" the result is dead-ball foul; a "flagrant unsportsmanlike conduct" foul requires player ejection. If a player's nonfootball-related act (e.g. taunting or cursing) causes an opponent to physically retaliate, it is considered fighting and both players are ejected.
The rules for celebrations in the Arena Football League were the same as the NFL; no props were allowed. However, choreographed or group dances were often seen after a score.
In the Alliance of American Football, it was an unsportsmanlike conduct penalty to propel the ball out of the field of play during a touchdown celebration. This "no souvenirs" rule was in place so that the AAF would not lose possession of the electronic tracking apparatus embedded in each ball.
The Canadian Football League is much more lenient than the NFL when it comes to touchdown dances. It often has very small, if any, penalties handed out to players who celebrate excessively.
CFL end zone celebrations often include more than one player, often a whole wide receiving corps of 4-6 players. Past celebrations have included five Calgary Stampeders receivers holding out their hands and mimicking the pouring of drinks from a champagne bottle, then stumbling around as if drunk; another end-zone routine simulated a bobsleigh run when receiver Jeremaine Copeland sat down and wrapped his legs around the goal-line pylon with the rest of the receiving corps tucked in behind him. The same group also pantomimed a four-seater stationary bicycle, which all players played a role for the bicycle.
Edmonton Eskimos punt returner Henry "Gizmo" Williams celebrated punt return touchdowns by doing a backflip in the end zone.
The Winnipeg Blue Bombers have a celebration whereby players form a circle, toss a football into the air in the center of the circle and then fall directly backwards in unison when the ball lands on the ground as if a hand grenade has exploded.
In the 2008 CFL season, the Winnipeg receiving corps did a few celebrations, most notably a version of Duck, Duck, Goose, as well as a walking race across the end zone.
In the 2009 CFL season, the Hamilton Tiger-Cats did a memorable celebration in Winnipeg, as a fishing boat was at the edge of the end zone. Hamilton scored two touchdowns within a minute, both times got into the boat and celebrating as though they were fishing, literally showboating.
During the August 14, 2010, a celebration by the Toronto Argonauts in which several players mimicked a rowing crew drew an Objectionable Conduct penalty.
In the 2018 CFL season, Ottawa Redblacks offensive lineman Jon Gott chugged a beer after teammate Mossis Madu scored a touchdown during the final game of the regular season against the Toronto Argonauts. Although Gott was not penalized, fined or suspended for the action due to the league relaxing its rules on touchdown celebrations, the CFL subsequently revised their policy to prohibit the use of alcohol or drugs or the mimicking thereof.
Long-standing tradition at McMahon Stadium has a horse run the length of the stadium with a team flag each time the hometown Calgary Stampeders scores a touchdown. The Montreal Alouettes' touchdown celebration is similar; it features a man carrying an Alouettes flag and running across the field every time the Alouettes score six points at Percival Molson Memorial Stadium. Other stadiums have developed similar traditions. The Winnipeg Blue Bombers have a small airplane (known as the "touchdown plane"), along with a cannon blast that goes off after every score. The Saskatchewan Roughriders fire smoke mortars from behind the goalposts in celebration of home team touchdowns. The Edmonton Elks have a fire engine circle the field after each touchdown, throwing souvenirs into the crowd.
It has been argued that celebration penalties have affected the outcomes of games.
The September 6, 2008, game between Washington and BYU saw the Washington quarterback, Jake Locker, score a touchdown, putting Washington within one point with two seconds to go. Upon entering the endzone, however, Locker threw the ball high in the air. His team was penalized, the referee applying NCAA Rule 9-2, Article 1(a)(2), which states that "after a score or any other play, the player in possession immediately must return the ball to an official or leave it near the dead-ball spot," paragraph (c) of which forbids "throwing the ball high into the air." BYU blocked the ensuing 38-yard extra point attempt and won the game. On December 30, 2010, Kansas State's Adrian Hillburn scored a 30-yard touchdown catch with 1:08 left in the 2010 New Era Pinstripe Bowl against Syracuse, narrowing the score to 36–34. He subsequently saluted the crowd in a quick military fashion and was flagged for unsportsmanlike conduct. The penalty pushed Kansas State's 2-point conversion attempt (to tie the game and possibly force it into overtime) back to the 18-yard line. Kansas State then missed the 2-point conversion, and Syracuse went on to win the game.