A projectile similar to Big Shot is shot like normal, with a tunneling projectile shot at an angle mirrored over the horizontal line of the aiming circle. Although this weapon might not do much, it certainly looks cool under the right circumstances. Firing at a negative angle will allow the "tunneler" portion of the shot to be fired above ground and act similarly to a standard tunneler, but the "shot" portion may damage you.
While a Tunneler explodes upon contact with an enemy tank, the tunneler portion of Yin Yang does not. The tunneler portion must go underground before it can explode.
While a Big Shot can hit tanks directly, the Big Shot portion of Yin Yang must hit the ground before it explodes.
The "Yong" portion of Ying Yang Yong travels horizontally starting at the base of the tank's gun. As a result, the "Yong" portion of the attack may miss your target, even when your tank is aligned horizontally with the opponent.