(CNN) Fifty years ago today, folk hero Bob Dylan caused an uproar when he took to the stage at Manchester's Free Trade Hall with -- wait for it -- an electric guitar. "Judas!" yelled someone in the crowd, referencing a traitor of biblical proportions. "I don't believe you," came Dylan's drawling, incredulous reply. For the British fans who had gathered to see their folk idol -- his 1963 album "The Freewheelin' Bob Dylan" had reached No. 1 in the UK -- this was the ultimate betrayal. RARE PHOTOS: Bob Dylan, in the beginning Audience members started slow hand-clapping. There were boos. People walked out.Dylan was booed by crowd and called "Judas" after singing with electric guitarOther controversial acts include Elvis Presley's "Hound Dog" hip moves in 1950s
If anyone knew the times were a-changin, it was _.