In the solo for "St. Thomas", Rollins uses repetition of a rhythmic pattern, and variations of that pattern, covering only a few tones in a tight range, and employing staccato and semi-detached notes. This is interrupted by a sudden flourish, utilizing a much wider range before returning to the former pattern. (Listen to the music sample.) In his book "The Jazz Style of Sonny Rollins", David N. Baker explains that Rollins "very often uses rhythm for its own sake. He will sometimes improvise on a rhythmic pattern instead of on the melody or changes." Ever since recording "St. Thomas", Rollins's use of calypso rhythms has been one of his signature contributions to jazz; he often performs traditional Caribbean tunes such as "Hold 'Em Joe" and "Don't Stop the Carnival," and he has written many original calypso-influenced compositions, such as "Duke of Iron," "The Everywhere Calypso," and "Global Warming."