Ghost tank:
Move a tank to the bottom of the screen, then inactivate it. Shoot another tank once or twice to force it to move down. Re-activate the first tank, position it so it faces directly downward, and drive forward until it re-appears at the top of the screen.
Move a tank to the bottom of the screen, then inactivate it. Shoot another tank once or twice to force it to move down. Re-activate the first tank, position it so it faces directly downward, and drive forward until it re-appears at the top of the screen.