Soccer Ball (Forge Item)
From Halopedia, the Halo wiki
The Soccer Ball is an item for Halo 3's Forge gametype. It can be placed on all the new maps. It can be used as a rolling weapon with vehicle-like splattering capabilities, a shield since it is indestructible, or just a fun playing soccer ball. Game types and maps for soccer ball usage will become downloadable content in the Bungie Favorites by Wednesday, December 12, 2007. (date of release is subject to change)