Ok, I’m a little late to the party, so I get most of the neck work that’s going on in this video, but this is cool as hell and I’d like to learn how to do it http://www.youtube.com/watch?v=janofZdKJHA&t=0m44s (it really gets crackin’ at about 44 seconds if the timed link doesn’t work). What exactly is going on? It doesn’t look like any double slaps, just like really quick string-popping. Are you just pulling the string really quickly? Any insights to this technique, or possibly a slow demonstration at some point?