Prior to the patch in Gears of War 2 where they put bots into the game a buddy of mine had our entire team quit on us. We were always pretty good but still we were up against another team of 5 people. We somehow managed to win two rounds in a row 2 vs. 5 before they all quit giving us the win. It was awesome to legitimately make another team quit when the odds are clearly in their favor. I still can't think of another time that beats that!