In terms of practical application, I was wondering about how to apply principles when an attacker is able to grab both your collars or both arms from the front. Most of what I have seen deals with grabs of one arm by the opponents corresponding arm (i.e. right to right, left to left). I can imagine how this could unfold by changing the relationship of the attackers position to mine, but have not seen yet an example in video of classes (apologies if I missed it or have not come upon it as I work through the classes from Dec to May).