I was playing in the Halo 3 Beta when suddenly a Bungie employee opened up the custom games lobby to us on Valhalla. We were confused at first, but then we realized how cool of an opportunity we were given, so we toyed around with the low-gravity and the speed-modifiers for a little bit. I started sniping people left and right while floating 30 feet in the air, and when I told my friends the next day they were all jealous. Thanks Bungie!!!