Apparently, “Under Pressure” wasn’t the only joint effort between Queen and David Bowie.

Brian May told Mojo Magazine that music exists from those sessions that hasn’t “come to light” yet. Describing the collaboration between Freddie Mercury and Bowie, May says, “Freddie and David locked horns, without a doubt. But those are the things that happen in a studio, that’s when the sparks fly and that’s why it turned out so great.”