Leg before wicket
Sometimes video replay and other technologies are used to decide if a batter is out LBW. For example, heat-tracking ("Hot Spot") can visually show when the ball has hit the bat or part of the batter's body, audio-tracking ("Snickometer") can show if there is a slight sound from the impact of the ball, and advanced simulations ("Hawkeye") can predict where the ball would have gone after impact with the batter's body if the batter had not been there.