Long before MTV Unplugged, Jefferson Airplane guitarist Jorma Kaukonen and Bassist Jack Cassidy thought it would be cool to perform a few old blues songs as a set-breaking contrast to the Airplane's acid-and-revolution epiphanies. This novelty act of the psychedelic circuit evolved into Hot Tuna, and Jesse Block's documentary, 25 YEARS AND RUNNIN', celebrates the simple sustaining power of blues, bars and tuna.