Neal, there is one other sting bending technique that you left out. After picking a string or playing a chord, Randy Rhoads would get that same effect by placing one hand on the top of his Les Paul (directly over the top of the toggle switch) and the other placed behind the headstock, and then push out on the headstock to bend the neck.

I have a question about last weeks pick scrape technique. I have seen some guitarists do the pick scrape and follow it with a hand slide. Are they fretting the strings with any pressure, or are they just doing a version of the scrape with just the skin of thier fingers? Thanks Neal, John