How to Find the hidden extra ammo cache on The Pillar of Autumn in Halo Reach Xbox360

So, in The Pillar of Autumn mission in Halo: Reach, if you're feeling like ammo is a little scarce, at least for the weapon that you're using, and are looking for an edge on the battle field, try making an entire ammo cache pop itself out of a wall! Yes, this is possible, and the only way that you can do it is by watching this video to find out!