Perhaps it is because it is a much smaller nation than the USA that the United Kingdom pop charts have historically been more prone to having unusual or esoteric records making their way onto and up the British pop charts. But that is not to say that surprise hits never occur here in the United States. They do, just not as often. But every once in a while a record that you just don't think of as a "pop" record somehow breaks through into the mainstream. A good example is the cool swinging, drum-based instrumental single "Topsy, Part 2" by jazz drummer Cozy Cole, which was a surprise cross-over hit exactly fifty years ago in 1958 for the talented percussionist when it went to the number one spot on the Billboard Top 100 Charts.
What was unusual and unprecedented about the number one pop single by the late New Jersey born jazz percussionist (1909 - 1981) was that it contained a lengthy drum solo, and remains one of the few drum solo recordings that ever made the popular Billboard pop charts. Additionally, it appeared not on a major label but instead was released on the tiny Brooklyn-based Love Records.