Committing a court infraction is an illegal act that can result in a penalty. It can involve travelling, fouling, footfaulting, clipping, or icing. Travelling is the act of moving one's feet illegally while holding the ball. Fouling is the act of making physical contact with an opposing player in a way that is not allowed by the rules. Footfaulting is when a player steps on or over the boundary line while serving the ball. Clipping is when a player makes contact with an opposing player from behind. Icing is when a player hits the ball across the net and it lands untouched on the other side.