Building warp

Im going to tell you how to do The building warp glitch which basically gets you on the walls inside a building. First you have to go to the second server (run in and out of a door until you dont see anybody). then once you are there you have to guess and check like say if i went to the second server using the battle arena and i walked to a certain spot went into my guild house and left my guild house i would be on the wall above the door. So the second server is basically the same room over and over you just cant tell where you are in it so you have to guess and check until you warp where you want to go.