This isnt really a glitch you can use to your advantage, just one thats there. Go on, rage me about it. Anyways, Just jump onto the wall, and slowly walk to the edge. It made a few people beg me for my "RPG wall hack" since I could shoot through the walls. Its just an object placement error by nexon, the object for the building and the wall dont match up. Im new, so idk if you can post glitches like this or not, so just tell me if i shouldnt be posting this here.