[oddguy]

He's not joking. I did it myself this morning. However, it's not as easy as ferril makes it sound. After running into problems trying to pull this off on 1-player, I decided to try it with Co-Op. My brother jumped in the warthog and sped past everyone on the bridge and went to the tunnel. There, he killed all living souls as I took care of the kids on the bridge...except the banshees mind you. Then, when my brother gave me the clear, I got on foot and lured the banshee into the tunnel. Now...when the banshee gets stuck between a car, don't try and push it out. Just move around and the banshee will take care of itself. The hardest part is timing when to highjack the banshee. You can't do it until the "Loading...Done" is triggered...otherwise it explodes. On Co-Op, one guy jumps in the banshee as the other triggers the Loading. If done correctly, you have the banshee. Once you have it, getting it through the tunnel takes some time. Once you're out, you can fly to the bridge and get the gun. Yay!

-oddguy