While it's possible to argue that a novice poker player may make a mistake at the table, that argument doesn't hold up if it involves an experienced poker pro. That was the excuse Brazilian poker player Rafael Caiaffa made during a recent tournament, but his antics have cost him an indefinite ban from the game.
Poker: A Joker can be wild, or can be a "bug", a limited form of wild card which can be used only to complete straights and flushes. War: In some variations, beats all other cards. Pitch: A point card in some variations. Jokers usually are marked as "high" and "low", one outranking the other.