Content description:
Multicolor poster has a central black and white photo of a building with added psychadelic embellishments and a sign reading "A Ritual Reality". At the top is a green field with a gray tornado at the center with "Bill Graham Presents In San Francisco / Twoster / Twister / Twister" in yellow. At the top left is a girl's face with winger and at the right is a frightened man in a wizard hat and cloak. At the bottom of the poster is more grass with yellow text listing the performars, dates and location, with an iris of an eye at the center.