Hey, I found out some really awesome sites that show some glitches of Halo 2. And if you have an account on Gamefaqs.com and saw the recent post of that guy who posted a pic of him on top the highest crane on the map Headlong, which you wouldnt be able to get on with a Banshee. These movies one of them shows a glitch of flying without any vehicle for a period of time. The other is Sword cancelling which is awesome after you watch it, (makes you able get higher than a banshee). Here are the links:
For flying glitch:
files.mythica.org/halo/darkhelmet/crazyjack2.wmv (you will have to control copy this link) ok now how to do it:
HOW TO DO IT:
OK, first off, you need two players, with swords equipped as a main weapon. You also need to be in Coagulation, since this seems to be the best place to do this.
Now, have someone face a warthog on a far side of the level, to where the passenger side is facing the entire rest of the map. Get someone to get into the passenger seat, with their sword equipped. Now, go up to the passenger seat and have the persone sitting there aim their sword at you, to where their reticule turns red. Have them swing the sword. The sword shouldnt move, you shouldnt take any damage, and only the "whoosh" sound happened.
Now, get to the other side of the level in a Banshee while your friend is still in the passenger seat of the warthog. When you have reached the other side and your in the air with the banshee, have the player exit the warthog with X. They should go flying across the level, hit your Banshee, and can jack it if they want. They can even switch weapons in midair and shoot everyone before they reach you.
For Sword canceling AKA getting to higher places where Banshees cannot go!:
http://www.nhgz.com/hosted/oryan/videos/BasicsofFlying_LowRes.wmv
PS: Another tactic not really a cheat: Ok go to blood gulch and go to the banshee garage, destroy the banshee and a chunk should fall off. now use grenades or melee it to the little gravity elevator it should get stuck. Now go to the gravity elevator an now you should get stuck. It is a really good way to own people and to base guard if you are defense for CTF.