Way back when, we featured an animation that documented the first acid trip of novelist Ken Kesey. In Kesey's case, it all happened in a careful, calculated way in 1959, under the care and control of the U.S. government. Six years later and 5,000+ miles away, John Lennon's maiden voyage went down in a very different way. A dentist--yes, a dentist of all people--slipped LSD into John and George's coffee, unbeknownst to them. Next thing they knew buildings were bursting into fire, and rooms morphing into submarines. So began the Beatles' experimentation with psychedelics and new musical sounds, which, together, shaped their 1965 masterpiece, Revolver (stream it free on Spotify).

John Lennon recounts that first acid trip in the animated video above. The link between psychedelics and Revolver gets covered in a new piece in Rolling Stone.

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