This trick works on any wall that is at a corner. Go to the corner, then lie down and hold L. Move the Analog-pad to the Right slightly. If you press it to the Right all the way you will not get into the wall. If you move it too little, your character will move slowly to the left. Repeat the process if it did not work the first time. Many players will use this glitch if they think they cannot win. Keep you head on and if you see no one killing you and you just see the wall, they just did this glitch.