The band was accepting contributions from outside writers at this point, and on this one Steven Tyler and Joe Perry
got some help from the Canadian songwriter Jim Vallance, who co-wrote many of Bryan Adams' hits. The Pump
album was recorded at Little Mountain Sound Studios in Vancouver. A few weeks before they started recording, Perry went to Vallance's nearby home trying to come up with a leadoff track for the album, something that "sounded like a dinosaur eating cars." He and Vallance developed this track, which did become the album opener with lyrics added by Tyler.