McCartney played the melody to his Kanye West collaboration during a 1999 interview with Michael Parkinson.

During the interview, the former Beatle discusses the birth of his second child, Mary. While in the hospital, McCartney noticed a painting of a man with two fingers playing a guitar. He attempted to recreate the man’s style and composed an entire song using just two fingers.

McCartney then begins to play the composition on guitar while whistling the melody from ‘All Day’. Watch the footage below. [via Complex]