there's All sorts of Glitching but why do people do it, because some people go right out the map, I have one video here its a tutorial of "Crab" "walking" sound familiar to you lot.But why do this is this more of an advantage to the other people your playing against?.Or if it is and advantage, than how do you kill them if there scattering around everywhere?
Watch this, its weird and i don't know how someone found it out.
YouTube - How to crab walk in gears of war glitch