Jump directly towards a wall, and right before you hit it turn your view 90 degrees to either side. You will start wall running, you can then immediately jump off the wall and use your double jump boost an extra time to gain some more height on your jump. Here you can see that it is very easy to jump into the 3rd floor window (B Flag) using this technique, or to jump on top of one of the evac buildings. Also included is the very simple zigzag jump, which is possible in a lot of locations where walls are very close together. I don't see anyone ever abusing these spots though, so I figured I would stick it on for anyone who hasn't thought of trying this yet.