I listened to the Fillmore version of this song today... on constant repeat... on the drive from Louisville to Nashville... a 2 1/2 hour drive. Over and over and over... and never lost interest one time. I am forever amazed by that song being performed live. I’ve seen Jack Pearson do live too, with his trio (Jack, plus drums and organ w/pedal bass). There’s probably not another song that better straddles blues/jazz/rock/early “fusion” even? (Maybe?) I was by myself. My wife would have turned it after 3m 20s.