The Mongoose Glitch is a glitch in Halo 3's Forge that allows players to bypass the boundaries of a multiplayer map. It requires two players.

Have one player (Person A) enter Edit Mode, spawn a Mongoose, set it down, and exit Edit Mode. Person A should then enter the driver's seat, and another person (Person B) should enter the passenger seat. Person A should then get off the Mongoose, return to Edit Mode, and pick it up.

Person A should now maneuver the Mongoose outside of the map, at which point Person B can dismount the vehicle and end up beyond the level boundaries. Person B can explore, but should be careful to avoid kill barriers, assuming that they weren't killed by such a barrier the moment they exited the Mongoose.

The glitch can also be done with Person B riding on a...

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