"To get back to the warning that I received. You may take it with however many grains of salt that you wish. That the brown acid that is circulating around us isn't too good. It is suggested that you stay away from that. Of course it's your own trip. So be my guest, but please be advised that there is a warning on that one, ok?"
Here is the brown acid warning from Woodstock. Most of the stage announcements were done by Chip Monck, John Morris, Wavy Gravy or Muskrat, so it's probably one of them. It may never be known since most of the people there were toast. I wasn't at Woodstock, but I did have some brown blotter in the mid 70's. It was truly a most foul ride.