How Axl Rose’s surprise appearance on Boomerang’s New Looney Tunes came together has finally been explained. 

Writers Rob Janas and Kevin Fleming explained how Rose made a cameo on the show by singing, “Rock the Rock.” On a recent episode of the Guns N’ Roses-themed podcast, “Appetite For Distortion,” Fleming revealed that he got the idea after attending the band’s concert and witnessing the members walk onstage to the Looney Tunes theme song.

Fleming admitted that Rose’s private persona made them doubt that the collaboration would actually happen. They even considered reaching out to Aerosmith’s Steven Tyler instead.

Read the full story on Ultimate Classic Rock.