Ken Kesey, Acid Graduation, 1966

The famed Acid Tests began in Northern California in late 1965 as events centered around the recreational use and the advocacy of LSD.  They were the brain-child of writer and activist Ken Kesey and his Merry Pranksters and were closely associated with The Grateful Dead - who played their first show under that band name at the second Acid Test in San Jose.  After a long year of run-ins with police and Kesey serving jail time for marijuana possession, these organized events came to a close with The Acid Test Graduation, held on Halloween night, 1966.