And if they grab you with one hand and initiate going to hit you with the other, what kind of footwork are you going to use?
So you're saying if someone grabs your arm, moving your feet has somehow become useless? I humbly disagree.
I'm not experienced enough to argue specific techniques, which is the main reason I didn't post one. My tip was a general rule of thumb; I feel this is the best kind of tip. If you let someone else control where you are, you're in trouble.