In some trick games—typically ones in which players are not penalized for winning tricks, and there is no requirement for trumping or following suit when possible—players may "slough", or play a card face down. A card so played is incapable of winning the trick; but sloughing has the advantage that the other players cannot see what card is played. As this form of sloughing has the potential to be used to cheat in most games (i.e. playing a winning card face-down to avoid taking an "overtrick" or a trick containing penalty points) and is thus not allowed, "sloughing" in the vernacular more often refers to simply discarding an off-suit card on a trick, particularly one that could be dangerous to that player if kept. This form of sloughing is important in evasion games and in some contract games where "overtricks" are penalized; in Oh Hell, for instance, a player who cannot follow suit may elect to discard a card that would win if played to follow suit later, thus reducing the chance that the player will "bag", or take more tricks than needed. This is common in Hearts, where high-value cards (especially Spades and Hearts) are dangerous as they increase the chance of winning a trick with penalty points.