Idles were recording in Paris when Warren Ellis of The Bad Seeds and Grinderman popped into the studio. He is friends with Ultra Mono
co-producer Nick Launay, and Talbot asked the Australian musician to contribute a "Hey!" to the song.
Ellis recalled to Uncut
magazine: "Joe turned to me and said, I'd really like to have some backing vocals like Malcolm Young. And seeing as you're Australian, you can do grunts, like on [AC/DC's] 'T.N.T.
.' The thing I like about Idles that I saw in the studio is that they're very much a group, and there's power and strength in a group. They see the potential in that, and that's an unusual trait these days. It was really great to see their love for being in a band."