When the above optimal no longer is possible Due to to much weight at one leg,
and being pushed or dragged, the Advanced Footwork "kicks" in.
However it still happens automaticly/naturally based on the the above "rules",
of getting rid of the force and return to full frontality with the optimal weight distribution - 50% / 50% on each leg.
The natural human structure always allows the body to return to its natural structure, no matter the situation,
ending in full control with a "possible" deliberately neutralization of the attacker.
From Fighting Stance or IRAS:
"Rescue" Step backwards
with front leg in the pushing direction to deflect pressure, ending with the front leg in the new attacking Line direction after regaining frontality.
"Rescue" Step forward (Ghost Step)
with front leg in the pull direction to neutralize pressure, ending with the front leg as rear leg in the new attacking Line direction after regaining frontality.
The angle towards the opponent (WT Lines) when moving, either forward or backwards,
is proportional to the wrist rotations (Unit Circle).