Recently heard an interview with John Sebastian, author of this song. He said that he and the members of the band, the Spoonful, were actually in Nashville playing some big huge mega concert and were in a bar drinking when a then unknown 19 year old guitarist named Danny Gatton
https://www.youtube.com/results?search_query=Danny%20Gatton took the stage and proceeded to rip them a new one via his guitar licks. He said there they were, big huge stars of rock and roll, slumming around, and here was this young kid playing circles around anything they had ever attempted to play themselves. Needless to say, Danny Gatton is now a guitar legend. You guys should check him out when you can. Awesome stuff!