"Excerpt from 'A Teenage Opera'" (also known as "Grocer Jack") is a 1967 single by Keith West, produced by Mark Wirtz. It was a big hit in Europe, peaking at number two on the UK Singles Chart. The single was part of a bigger "A Teenage Opera" project. According to Mark Wirtz, the song comes from a dream he had about an ageing door-to-door grocer named Jack in a small, turn of the century village, who was as mocked by the children as he was taken for granted by the town folk.