The song, from the 1975 album `Physical Graffiti` evolved out of a jam session, and was written by Robert Plant, Jimmy Page and John Paul Jones. The l The song, from the 1975 album `Physical Graffiti` evolved out of a jam session, and was written by Robert Plant, Jimmy Page and John Paul Jones. The lyrics were inspired by blues musician Robert Johnson`s 1936 "Terraplane Blues". A Terraplane is a classic car, and the song uses car parts as metaphors for sex - "pump your gas," "rev all night," etc. It became a standard part of Led Zeppelin concerts from 1975 onwards. When the song was played live the band would often extend it with lengthy guitar and keyboard solos, , and sometimes segue it into the song "Gallows Pole", showcasing John Paul Jones` skills as a keyboard player when performed on stage. A notable example is the version played at the Earls Court Exhibition Centre in 1975, as featured on the Led Zeppelin DVD, which includes an extended solo by Jones on a Hohner Clavinet D6. more >> <<less