Actually, that part started life as a synth. It's a song I wrote on a computer, using a sort of synth guitar. It was a quick job I did for a computer game. And it obviously cried out to be a proper guitar thing, so I went for it. These days I'm using my fingers to pick more. Because there are a lot of things you can do by plucking the strings in different directions. And it also links into tapping, because your right hand isn't holding a pick, so its free to go up on the fret board. I'm not heavily into tapping, but there are certain things you can do where the [right hand] finger can also hit a fret and get little transition notes, which can be really nice.