Carlos Santana says the best concert he ever saw was watching Jimi Hendrix play at the Northern California Folk-Rock Festival whilst he was high on acid.
The 77-year-old musician's own band Santana was part of the line-up that performed at promoter Bob Blodgett's music event, which was held at Santa Clara County Fairgrounds in San Jose, California, between May 23 and May 25 in 1969.
