Pitch invasion is a phrase used to describe an event in sports where a large number of fans or spectators enter the playing field or pitch during a game. In soccer, it is often referred to as a "field rush." Other synonyms for pitch invasion include crowd trouble, fan invasion, and stadium incursion. However, not all intrusions onto the field during a game are negative. For example, when a team wins a championship, fans may rush the field to celebrate. This is sometimes called a victory lap or championship celebration. Regardless of the reason, a pitch invasion can cause safety concerns and disruptions to the game.