It is for help with backing up your games
And I still don't know your sword glitch. I mean, there are a lot. You mean the one when you target with a rocket launcher, then hurry and press Y-R and you will lunge with the sword to the person you targeted with the Rocket.
THere are many portions of the map that can be gotten. Single player swod tricks are not too common.
If you can sit on a tank, do so then target a ghost/banshee with the sword. When the crosshair turns red, press R and hold it. After the ghost/banshee flies way far away, let go of R and hit X to get off of the tank. You will fly a great many distances.