This is a way of getting the cowbell skull for halo 3 without using the gravlift. Any explosive weapon, (fuel rod, brute shot, etc This is a way of getting the cowbell skull for halo 3 without using the gravlift. Any explosive weapon, (fuel rod, brute shot, etc), will work. And maybe a grenade, not sure on that one tho. I look retarded when im moving the second barrell but just bare with me... Enjoy