Uno is one of those classic card games that has its place nearly every home. Despite its popularity, apparently none of us have been playing it correctly. One woman named LaToya McCaskill Stallings made this huge discovery and shared it online. Naturally, it blew all of our minds.The card that everyone misplaysThe card in question that's making waves: the +4 card. When we play, we throw it down whenever. However, according to the official rules, the card is only to be played when you've got no other cards available to play. The player could very well bluff and attempt to play the card when not allowed. If the player is caught cheating then they must pick up 4 cards instead. If they are falsely accused of cheating, the person accusing them must pick up the 4 cards plus an additional 2 cards.You'd think that this wouldn't be big news, but it is: the post was shared over 120,000 times. Card games are serious business.