gears of war 2 Easter Egg - Yee-haw!

At the beginning of the mission "Rolling Thunder," (insane difficulty) there are three cowboy hats somewhat hidden around "Betty." The first is on the barn behind you, the second is under the wheel of one of the vehicles to your right, and the third is sitting under a large propane tank. Should you shoot them all, you will hear Dizzy yell "Yeeeeeeeeeeeee-Hawww!", and your entire team will have cowboy hats. Later on in this same mission, provided you were able to advance far enough into the level, a corpser will appear. He will be wearing a ten-thousand-gallon hat, and he will scream in a deep, gutteral voice, Dizzy's "Yee-haw!" After this, he will crawl back underground, and you will advance. This was obviously placed here either to pay tribute to Dizzy, or because it's just plain epic (no pun intended).