Booing is an act of publicly showing displeasure for someone or something, such as an entertainer or an athlete, by loudly yelling "Boo!" and sustaining the "oo" sound by holding it out. People may also make hand signs such as the thumbs down sign. If spectators particularly dislike the performance they may also accompany booing by throwing rotten fruit on stage. Players booed for their performance felt booing "spooked" or "bothered" them or their teammates, and that it "affected their performance". Nick Swisher stated "It hurts. Sometimes I'm a sensitive guy and some of the things people say, they get under your skin a little bit." Ledley King stated, "It just frustrates me when the crowd boo England, who is that going to help? It just heaps more pressure on the players and gives us even less of a chance of scoring". However, the counterargument goes that the combination of booing and applause help keep the quality of public performance high, by emotionally rewarding the good and punishing the bad. Booing is not always a judgement of performance, but can be an expression of disapproval of a third party. Sports In sports, booing by fans is quite common. They may boo particularly-hated players on the opposing team (such as when they leave their original team to individually sign with another team in free agency, or get traded to said team and sign for a significant amount of money), or any opposing player when there is an intense rivalry between the teams. Unsportsmanlike behavior is also booed, such as intentionally hitting home team batters in baseball or diving in association football or basketball (where it is a technical foul). Booing of referees or umpires after an unpopular ruling is also common. Booing of expelled players after receiving a second yellow card or a direct red card is also common for many reasons. In professional sports, one's own home team, players or coach may be booed due to a poor performance or season. Examples In 1968, fans of the Philadelphia Eagles of the National Football League infamously booed and threw snowballs at a man dressed as Santa Claus in what became known as the Philadelphia Eagles Santa Claus incident. Adam Goodes who played for the Sydney Swans in the Australian Football League was repeatedly and loudly booed by opposition fans during the 2015 AFL season at most of the matches whenever he