Found this by accident, if you look at the first pic I jumped on the explosives barrels and kept jumping into the corner, hiding inside whilst the battle happened outside, whilst jumping my char disappeared, and it ended up INSIDE the wall. So now I'm just sat there leeching rep and honor off of the battle happening outside. I just keep using Thunder Clap now and then.
Only thing that sucks is that I can't now get out of the wall
Two pics to help describe this.