When you are in the process of tea bagging someone, you pause for a moment with the balls resting on the face. You then hold the penis (still soft works best) up in the air and yell "Timber!" Then proceed to let shaft fall onto the persons face, preferably with a distinct smacking sound. For additional amusement, perform this while executing the ballnoculars, or the Gonzo.
My girlfriend was already angry with me last night, so I figured I may as well tea bag her with a couple of lumberjacks thrown in for good measure.