How to do the new Ambush glitch

[OLine57]

First let me say this might turn into a long post, but I promise it'll be worth the read. OK, go to the back of the map where most of us know how to get out. The wall behind the yellow car where you spawn sometimes. For those of you who know how to get out of the map, skip to the next paragraph. A quick tut on getting out of the map. Have a friend go prone and put his nose in the corner, have him push forward on the left stick while looking up. (looking up increases the chance you'll land on his head properly.) Jump on his head and tell him to stand up. When you land on his head properly, you will kind of "stick" in the corner, that's when you tell him to stand up. Once you "stick", hold forward on your stick, tell him to stand up, and start jumping. You'll eventually jump over the wall and out of the map.

OK, now the sweet part. Make sure you have RPG's, you can't do this without them. Don't jump over the wall. Stay on it. To your right is an invisible wall where the wall post is. To your left, the wall extends behind the building. SLOWLY AND CAREFULLY, follow the legde until you're only on the little ledge behind the building. Face away from the buliding, towards out of the map. Pull out your rocket launcher. Aim it at a downward angle away from you. Fire your rocket launcher. Just before the rocket comes out, jump and push back on your stick. If you did it right, you should be on that building. From there you can jump on the other buildings, which will eventually put you back in the map. I recommend run jumping from building to building no matter how close it is, because there seem to be some low invisible walls in random places. I fell down a few times. But I didn't have any trouble when I used a run jump. Explore all the buildings, they all offer different vantage points. Eventually after you jump to 5 or so different buildings, you'll come to a spot where there is an invisible wall, and you can't go any further. That's as far as I've gotten. Enjoy!! I had a blast exploring all the different buildings you can jump to.

P.S. You don't need oldschool for this.
P.P.S. Credit for the idea of jumping onto the buildings from the wall goes to Mobadi. I probably never would have thought of it.