Instructions
Start the "Halo 3" game. Scroll down the main menu and select "Forge" with the "A" button. Select the map "Sandtrap" and hit "A" on "Start Game."
Go into editor mode by hitting "Up" on the D-Pad. Walk around the map and delete all of the Fusion Coils and Plasma Batteries with the "Y" button. Head over to the Elephant. Pull up the item menu screen by pressing the "X" button. Scroll down and press "A" to drop down all of the Fusion Coils and Plasma Batteries into the Elephant.
Hit "X" to pull up the item menu screen. Scroll down to the Fusion Coils and press "X." Change "Run-Time Maximum" from zero to eight. Repeat this process with the Plasma Batteries.
Shoot at the pile of Fusion Coils and Plasma Batteries. The resulting explosion will send the Elephant into the air, keeping it afloat with a consistent set of explosions, giving it the illusion of flight.