BEFORE THE DOORS recorded the first take of “Roadhouse Blues,” the boogieing lead-off to their fifth album, Morrison Hotel, frontman Jim Morrison set the scene for the band by describing a vivid scene with his natural gusto.

“Do it, Robby, do it!”

If I could pinpoint my favorite moment in any Doors song, it would probably be this one: Jim Morrison, a famously spontaneous (among … other adjectives) bard of a frontman, getting so excited to hear Robby Krieger’s guitar solo in “Roadhouse Blues” that he shouts an intro prior to the first chord.