Halo Easter Egg - Secret Supplies

For Halo 1 for PC. The Level where you are in Canyon A and you are in front of the Pyramid Type thing, before you go up it. The Large Support thing coming from the middle of the pyramid to the ground. At the bottom end of it, it goes into the ground, but causing a crack around it. Fall into the crack, and there is two dead marines that had a sniper rifle and ammo, and a rocket launcher with ammo. I dont remember if there was ammo for the rest of the human guns. YOu exit the chasm by walking along the support thing on the side(either) and it walks right out. **** I've only been able to do this once and the hole has been empty since. ****