THIS IS FOUND BY ME NO-ONE ELSE HAS POSTED THIS!!!
Ok, Now this glitch works on both Bravo and Alpha
First go up the stairs and look at the corner.
Then Sprint, You should end up looking down at the hallway.
Just Sit on the arc and own your enemy's. oh and try not to be to far back on the arc or your arm will stick out an you can be killed, But other than that your invincible their.
Please thank me for this