If a tail counts as an Extra Arm or a Striker, or is a fish tail, treat it as a limb (arm, leg) for crippling purposes; otherwise, treat it as an extremity (hand, foot). A crippled tail affects balance. For a ground creature, this gives -1 DX. For a swimmer or flyer, this gives -2 DX and halves Move. If the creature has no tail, or a very short one (like a rabbit), treat as torso.
An attack that misses by 1 hits the torso instead. Heart, lungs, kidneys, etc. Increase the wounding modifier for an impaling (imp) or any piercing (pi-, pi, pi+, pi++) attack to x3. Increase the wounding modifier for a tight-beam burning (burn) attack to x2. Other attacks cannot target the vitals.