Paul McCartney revealed John Lennon created the intro of The Beatles’ “I Feel Fine” by accident when he hit something with his guitar.
Paul explained why the guitar was named after The Everly Brothers.“I Feel Fine” became an international hit.
The Beatles‘ classic hit “I Feel Fine” opens with an unusual sound. In a book, Paul McCartney revealed John Lennon created that sound by accident when his guitar hit something. Subsequently, The Beatles had a strong reaction to the sound. In the 1997 book Paul McCartney: Many Years From Now, Paul recalled John used a “semi-acoustic Gibson guitar.” “John and George both had them; we used to call them ‘Everly Brothers’ because they were very similar to the ones The Everly Brothers had used and we liked the Everlys a lot,” Paul recalled.
Source: cheatsheet.com