The first time Yoko spoke out at full volume during a recording session it was to convey some relatively trivial word of advice to John about whatever he was singing at the moment. The other Beatles looked around, straight-faced, startled, stunned. There was a moment's dead silence that was broken by Paul: "Fuck me! Did somebody speak? Who the fuck was that?" Of course he knew full well who had spoken. The others joined in: "Did you say something, George? Your lips didn't move!" "Have we got a new producer in?"
John, Paul, George, Ringo & Me: The Real Beatles Story, Tony Barrow (2005)
John Lennon and George Harrison play the fool while Paul McCartney chats to host Cathy McGowan during rehearsals for The Beatles' second appearance on Ready, Steady, Go!, 20th March 1964.