You can easily do the Tank Pinball glitch in Halo 4's Forge Islands. Instructions: 1. Load up Forge Islands in forge. 2. Spawn a scorpion and hold it sideways slightly above the ground. 3. Hold the left trigger and fly forward, dropping the tank on the ground as you hit top speed. 4. Watch the tank fly off into the distance. 5. ??? 6. Profit! You're welcome.