One April evening 60 years ago, John Lennon and George Harrison ingested something that they'd never experienced before, and didn't even know they were consuming. It would be the start of a wild night out on the town, and the beginning of the transformation of the sound of the Beatles; and, by extension, it would help create a new genre called "acid-rock." Randy Renaud revisits that crazy night on this week's edition of the Chronicles of Rock.