180-gram black vinyl. "Thrust" is a jazz-funk album by Herbie Hancock, released in September 6, 1974 on Columbia Records. It served as a follow-up to Hancock's album "Head Hunters" (1973), and achieved similar commercial success, as the album reached as high as number 13 on the Billboard 200 listing. The lineup for Thrust is the same as on Head Hunters, except that Mike Clark replaced Harvey Mason on drums. This is Hancock's fourteenth album overall. The composition "Actual Proof" was originally written for the 1973 film "The Spook Who Sat by the Door", and Hancock has used it as a demonstration of his style of playing the Fender Rhodes piano. The composition "Butterfly" would subsequently be performed on the live album Flood, and two other studio releases: Direct Step and Dis Is da Drum. "Butterfly" is the opening track on Eddie Henderson's 1978 album Mahal, which features Hancock on keyboards.