Gears Of War Glitches

So far I have done three of these glitches and seen that they worked. One if you are the host of a game and you press x and b one after the other eventually you will chainsaw yourself and keep on livin at large. Second I was able to equip the lancer and by pressing a and b I was able to long jump over the area where an enemy was below me and chainsaw him in mid air with the timing correct. Finally I was able to explore to "back country" of the tyro station by wall pressing next to the Torque bow area and running so I was lifted up to the balcony, and by jumping off at the end I was able to land in an undeveloped area/desert and fight there. These are what I know so can you tell me about any other ones you know about?