I almost had my final achievement for Halo 3 the other day, but I got ripped off. This last one is two for one, and I somehow wissed the shot. Basically, construct, top floor, near sword room. I have spartan laser, and I see two guys fighting across the room adjacent to the sword room. They're just standing there beating the living day lights out of each other, and meanwhile I'm holding the R button down and waiting to unleash the blast. It hits the end and almost discharged, but it didn't. Somehow, I was ripped off of my sword and two for one achievement, and I never released the damn R button. It still had 40 charge in the laser, and even the other guys in the room saw that it had almost gone off but didn't. Man I'm so f'ing mad right now. Oh well, another match on snowbound should secure it.