I learned in Balintawak a nice Thumb Peel. I teach this to women in particular who are afraid they might get their hands squeezed from the bigger guys.
You place your hand on top of theirs for the shake. You middle finger goes along their thumb, while your thumb finds the end of their thumb. You peel back their thumb while compressing the nail and last joint of the thumb. One cannot squeeze well without the thumb.
No I agree, in situation on the street I might not do this. In a sports bar where most of the guys think they have been in a
"REAL" fight in their lives, would shake your hands to save face. They might also be trying to squeeze you and show how strong they are. Just peel back and voila they look like the fools.
While your have two of your hands on theirs, you must continue to monitor their motions. If they go to pull back without letting go, then step to the outside and stay with them. This makes it harder for them to stick a knife into your with their left. Not impossible just harder. So, while you have both hands on theirs you can move your left up to his elbow, and this gives you pivot control of the opponent. If he lefts go, then you strike a groin strike with your right. If he punches with his left and hangs on with his right, you can still step outside causing him to cross himself and have no power. You can bring your hands up and trap his punch into your shake. Lost of ways to move from their.
Once one gets two or three deep it requires the person to see, not just see with the minds eye to follow the flow of the techniques.