There was one I heard on the radio that's not played very often, I think it's called Dragon Attack. It seemed heavier and more guitar-riff driven than most Queen on the radio, and I was all "jazzed" up (no pun intended) to look up the album Jazz, as that was the album it originally appeared on. I didn't even end up listening to it, as the wikipedia description said that except for that one song, that album is one of theirs that least resembles hard rock.