Beer snake
A beer snake, or cup snake, is the stacking of numerous plastic beer cups to form a "snake." Beer snakes are most commonly found at sporting events that are played out over many hours, such as cricket. Some snakes have been reported in the media as being up to 175 m long. They are typically formed during breaks in play or when the outcome of the match is all but certain: for example, when the fourth Test of the Pakistani cricket team in England in 2006 tour at The Oval was halted after ball tampering allegations, a large  beer snake was constructed in the OCS stand. Materials. A beer snake is made with a large number of empty plastic beer cups, usually those issued by the bars on site at the stadium. Many sports stadiums do not allow glass containers for safety reasons, and use plastic cups for serving beer. These plastic cups, once empty, provide the flexible building blocks for constructing the beer snake when inserted into each other. Origins. The first recorded beer snake occurred on June 24, 1969, at Wrigley Field Chicago, IL as documented in the Chicago Sun-Times edition published the next day . This predates, by nearly three decades, the previously documented earliest beer snake in January 1997 at the WACA Cricket Ground in Perth, Australia. A newspaper article in the Sydney Morning Herald cited Michael Gray as "The Snake Charmer" and architect of the social phenomenon. Procedure. As such a large number of cups are needed, gathering normally occurs in large groups of people. The cups are simply stacked within each other until they form a tube or 'snake'. Once the snake has reached a substantial length it is held skyward to 'dance' as if being charmed. Snake length is often restricted  by the width of the bay of seats as anything longer will protrude into the aisle. One solution to this is to team up with other groups and link your snakes together. The biggest challenge is to keep the snake in one continual piece, without it collapsing (as shown in image). Security staff at many sporting venues normally deter such behaviour, and will often attempt to confiscate the empty cups from people attempting to build a beer snake. This is in part due to the potential dangers of such structures in crowded places, and also because the component cups are  often not completely empty and will therefore spill beer on to spectators. As a result of several minor injuries that occurred when a beer snake collapsed during a regular season Canadian Football League game, the Winnipeg Football Club banned the creation of beer snakes during Winnipeg Blue Bombers football games.