When a goal is scored in football, the fans of the scoring team celebrate by raising a chair above their heads. This tradition is most commonly seen in Spain, where it is known as chairing the scorer. The practice originated in Madrid, and has since spread to other Spanish cities such as Barcelona and Seville.
The tradition began at the Santiago Bernabéu Stadium, home of Real Madrid. In the early 1990s, a group of supporters known as the Callejones (Alleyways) would bring chairs from their homes to games and hold them up whenever a goal was scored. The idea quickly caught on with other fans, and soon it became a common sight at Bernabéu.
Nowadays, chairing the scorer is widely considered to be bad luck. This is because when former Real Madrid player Ronaldo Nazário scored a hat-trick against Valencia in 2002, three members of the Valencia team were subsequently sent off. As a result, many teams now avoid celebrating goals by raising chairs above their heads.