"Friendly" Brutes

The Friendly Brutes glitch is a glitch that can make the Brutes, who are normally enemies for the player, to regard him as an ally and not attack him when they see him.

How to do it
On the Halo 3 level, Crow's Nest, where Miranda Keyes, Sergeant Johnson and the Thel 'Vadamee aboard the last Pelican dropship leaving the base, before the battle finishes, set a deployable cover outside the door that the second wave of Jump Pack Brutes emerge from, blocking their way. Kill the Brutes that are already present, and return to the deployable cover. Take down the shield, though do not destroy its base, and you are able to enter the room until it regenerates. The Brutes present will no longer regard the player as an enemy and though they will look at the player, they will not attack. If the deployable cover is destroyed, they will continue outside the chamber and will regard the player as an enemy.

Note

 * This will work with other brutes in other levels, and may also work with other enemies.
 * It is unknown why it usually works on Brutes.