Two Arbiters Glitch

Description
This glitch will make it to where on Halo (The Level) there will be 2 Arbiters with you.

How to do
The First step requires you to be able to kill the arbirter right before the fight with 343 Guilty Spark (Monitor). In order to do this you will have to do the Spartan Laser Glitch. Once You Have The infinite spartan laser go to the door right before the fight with 343 Guilty Spark. Shoot the Arbiter (Character) with the spartan laser until he dies. (This is easily done on Easy) Then Quickly go to the door and initiate the cutscene. Once you finish the fight with 343 Guilty Spark go outside and there will be 2 arbiters. One standing looking at you and another already attacking the awaiting flood. That one has the waypoint above his head. Once near the end both of the arbiters will stay back. If you kill the one without the triangle above his head when he comes back he will have it above him and become your partner

Explanation
This happens because when you enter the fight it originally unloads the Arbirters model then when finished with the fight it reloads him back to the hallway. But since you kill him the game registers him as not there so therefore not unloading him. And when you finish the fight he is still there and the game still loads the 2nd arbiter because the game's code doesn't check if the 1st arbiter is unloaded.