How do you glitch in crossfire

if you are talking about cod modern warfare, i know a glitch. first go to the half crumbled building, then go upstairs and you will see a cooker or a dishwasher, (cant make it out) and the jump on it, face backwards, then jump backwards, if you are new to the glitch it will take a while to get used to. then you will be on the slope bit the again, walk back to the edge and jump backwards. you will be o the top of the building. edge up to the left edge of the buildig, the walk across the wall, keep exactly in line with it. go left, alig with the wall, then walk across the barb wire on the floor. you will be on a building. walk across the invisible bit then edge up to the edge, go prone then sniper people. fun fun, lots of ppl know the glitch, so check back every once in a while. hope you like it :]