With two players, enter the Sandtrap on the Forge. Try getting as many pre-placed fusion coils and plasma batteries before you start. Place as many fusion coils and plasma batteries as possible in front of an Elephant, then drive into the pile. Shoot into the pile until it explodes. It will either just jump a little, stand up on the rear, or turn all the way around. When you get close, the message "Press RT to... Wait. How did you do that?" will appear. You can also flip an Elephant by making two of them collide.