I was at the Columbus show. Yes it was mostly heads from Athens as Athens was major mecca for freaks and heads. Next night they were in Athens for a freebie. If I remember correctly a guy from the SDS tried to stop the show to get us to go protest somewhere. I don't think anyone left with him. Yes around midnight some University a-hole turned off the power. I do remember some of the Dead going acoustic for a while. I also remember them jaming at one of the hippie farms outside of town into the wee hours.