Ride in a Phantom
In the level The Covenent,you will have to deactivate the second tower. after you fight your way out of the now flood infested tower a green phantom will come to pick up the Arbiter and the remaining elites. While their getting in the Phantom you can also hop in. It will fly you away and start to dissapear. Then you will die and spawn at thte same spot w/ the same weapons.