#1
What the hell means "rake"? I've seen it on a lot of tabs, but don't know what it means.. Please explain how to rake..
#2
It's kind of like sweep picking (know what that is?) only with more palm muting. Let's say, in a solo, you wanted to start on... oh... the 7th fret of the B string (complete example). To start off, you could heavily palm mute the A, D, and G strings, sweep the pick really fast across them, and then hit the 7th fret hard.
It's more of an effect-type thing, and doesn't really serve too much melodic purpose. Good for showing off, though.