Gears of War 3 Easter eggs

Mad World played during Gridlock (Multiplayer)
To do this is simple, play a match with at least 2 round wins required to finish a match and go a whole round without destroying any of the "ash people" within the multiplayer map. (This includes everyone playing, not just you, noboby can destroy a ash person) The next round, a instrumental piano version of "Mad World" will play for about 50 seconds at the beginning of the round. Enjoy!