This jam is IT. As I listened to it develop from stage to stage, it really became clear to me what Trey's been talking about in recent interviews - how listening is so important. If you listen closely, so much of what he picks up on the guitfiddle is pulled from the things he hears Page playing on piano. Call it "theme development" if you wish, but I'm with @standard in the sense that jamming really is something that just happens. I don't get the sense that the guys think about developing themes...it's jams like this that show you how attuned they are to each moment. You can't play something like this while trying to think about how its going to play itself out in the next ten minutes. You have to just listen, and fine tune your piece of it so that it'll fit inside and somehow take it to new levels.

This jam rules, man. And when Trey hits that note...wow. That's just where it's at, right there.