Grunt Aerobics

Grunt Aerobics
If you grab the Banshee earlier in Assault on the Control Room (See Early Banshee), you can finish the level without having to open those big doors at the end, and fighting the hordes of Covenant! Just park your banshee backwards so that the front is faceing toward the ramp leading to the top and once it is backed up against the door as far as it will go, press X to get out. It should push you through the door and all the enemies will be frozen, since the door was never opened. The only things that move are little circles of Grunts that jump up and down in sync, one after the other! This might take a while to get right, but it is totally worth being able to melee a Golden Sword Elite in the back unopposed!