Requirements: nothing

What to do: There are two boxes you can climb on top of in the map to enter the building in the center of the map. This glitch only works on those two boxes. One way to do it is just corner glitch at a corner of one of the boxes and spin your character around so its legs are in the box. Push back with your analog stick so you start crawling backward into the box, then just stand up, walk back, and your in! If you do not know how to corner glitch, just lean against the wall whichever side your on and climb the box. Note to NEVER STOP LEANING!!! Once you are on top of the box, walk back still in your leaning position and as soon as your character starts falling, push your analog stick forward and you will enter the box. I know its confusing, but once you get it rite once, it will be easy :]