A backboard shattering is an accident or stunt in basketball. It occurs when a player slam dunks the ball hard enough to break the 1/2" tempered safety glass of the backboard. The stunt has caused games to be canceled or delayed, serious injuries to occur and expensive costs of cleanup and replacement. Shattering a backboard is extremely dangerous, sending shards of glass flying over the players and fans. In the National Basketball Association (NBA), shattering a backboard during a game is penalized with a non-unsportsmanlike conduct technical foul and a possible fine towards the player. The player may not be ejected, nor shall the foul count towards a player's total towards either ejection or suspension.