Ken Kesey's Ultra Rare 1966 studio recording of the Acid Test with The Grateful Dead. Legendary documentation of the 1965-66 Bay Area Acid Test scene from 14 hours of the actual trip (recorded in a studio). Lots of amazing mind games and wordplay with Ken Kesey and Ken Babbs in good form, ad-libbed poetry, fractured harmonica solos, tape loops, and the Grateful Dead lurking in the background.