I really felt that either the Light jam or the Sally jam or maybe both were the merging of the two major jam themes that they were playing with. You have the Under Pressure jam from Ghost and the Manteca jam from Theme come together in some of the greatest improv I have ever witnessed. I find it kind of funny that the first time I heard both of these jams was in an 11/1 version of Twist. I need to go back and dig and see if I can find roots of these jams that existed before those 11/1 Twists