A fumble in American an Canadian football is any act other than passing, kicking or successful handing that results in loss of player possession. A fumble may be forced by a defensive player who either grabs or punches the ball or butts the ball with his helmet (a move called "tackling the ball"). A fumbled ball may be recovered and advanced by either team (except, in American football, after the two-minute warning in either half or 4th down, when the fumbling player is the only offensive player allowed to advance the ball, otherwise the ball is ruled dead at the spot of recovery if the ball bounces backwards or spotted at the point of the fumble if the ball travels forward). It is one of two events considered to be turnovers, where possession of the ball can change during play.