Something I found messing around last night. (I assume this is also possible on 360) Start an Old School private match at Crossfire. Go to the building in the far corner, to the Northeast. On the second story you'll find a chair close to a washing machine. Jump onto the back of the chair and face the wall it's up against. You'll notice the bricks form steps; jump onto them. Then level yourself with the third floor, and jump onto it. When up there, get onto one of the slanted chunks o' concrete and jump onto the roof. From there, you should be looking out at the background. Jump straight off...you'll fall into the abyss. Now, repeat the process, but first pick up the Barret on the Southeastern side of the map. When you get back on the roof, turn right towards the building, and walk around it's edge. You'll be floating. You can walk to the roof of the next building by crossing over the wire barricade, but we're going to fall onto the small brick fence bellow. You can't go past the tree line in front of you without dying, so don't try. Instead, walk down the street to the right. Follow that all the way down 'til you come to a dead end. Look between the fence and the wall to your right, but don't step off the edge. The background should turn black, but you'll notice a small white dot in the distance. Look through your scope, and you'll see it's actually a man. You can see him from a different angle if you walk back and look down the abyss next to the stone fence around the corner. Worthless? Yes, but it amuses me. Edit: FIXED.