A trick play, also known as a gadget play, gimmick play or trickeration, is a play in gridiron football that uses deception and unorthodox tactics to fool the opposing team. A trick play is often risky, offering the potential for a large gain or a touchdown if it is successful, but with the chance of a significant loss of yards or a turnover if not. Trick plays are rarely used not only because of the riskiness, but also to maintain the element of surprise for when they are used. Trick plays take advantage of defenses' expectations and conventional wisdom, the set of basic principles to which most offenses adhere. Most offenses follow a basic set of conventions in that once the ball is snapped to the quarterback, it seldom changes hands more than once: a hand-off or pitch to a running back, or a forward pass, and the players with the best skill sets for those particular plays are the ones that will execute them. For example, the quarterback is by far the best thrower on the field in most situations and would thus be relied upon for the vast majority of forward passes; likewise, kickers are, in the modern era, seldom relied upon for anything other than kicking. The typical American football playbook relies on simple, relatively low-risk plays with high odds of gaining yardage and low odds of catastrophe (a turnover, loss of yardage or, in the worst-case scenario, the other team scoring points). Trick plays eschew these principles: trick plays can easily exploit a defensive weakness if it is not foreseen, but if the trick is foreseen, it can be easily foiled, and the risk of catastrophe is much higher. Background In most conventional forms of American football, the quarterback receives the ball during the snap and then either throws it or hands it off to another player. That player, the "receiver", attempts to move the ball forward past the line of scrimmage. If they are successful, the line moves forward to that point and the process continues through a series of "plays", eventually (ideally) to a touchdown. Due to a variety of interacting rules, offensive plays generally fall into two distinct groups. Plays where the (planned) source of gains are through the quarterback throwing the ball forward are known as "passing plays", while those where the gains are due to the player running with the ball