I saw them perform this live in the late sixties at the Grande Ballroom in Detroit. It was one of the most memorable performances there I can recall (although Cream and Jeff Beck trumped them). The intense percussion, strobe lights and echo loops took it over the top, just fantastic live.
Funny thing though, today it's used as background music for umpteen TV commerials; my wife and I start reaching for our "Air Lugers" to shoot the TV whenever we hear it. It has now become the equivalent for me of squeaky chalk on a dry chalkboard.