One of life's great joys is getting back at someone who wronged you. Unfortunately, that's not always easy to do in real life, but on the card table, oh yeah, the revenge can come fast and furious. Bring on the absolute savagery. Especially when you break out the UNO deck, right? It might not have ended as many friendships as Monopoly, but if there's anything players seem to agree on, it's that you need to be able to be as gleefully and unrepentant a jerk as everybody else at the table to really make the game worth playing.