An acid test tribute was held at the Mission Rock Cafe on the Dock of the Bay in San Francisco. The two Dead shows were four days apart so the Merry Pranksters cooked up an Acid Test Tribute held at the Mission Rock Cafe on the dock of the San Francisco Bay. The Acid Test commenced at 8pm on May 12, 2009 and ended at 8am the next morning. Did you ever pass the acid test?