There are so many clues about A Night at the Opera in the first three albums if you care to listen, you know. You know, people pretended to be so surprised about Bohemian Rhapsody but really if you listen to The March of the Black Queen so much of that equipment is in there. It harks back to Mantovani, cascading strings of Mantovani, I don't know if this is something which is known these days. But I remember Mantovani, he's an orchestra leader, and most of his stuff was violins, and there was a song called Charmaine. He had one violin play each note, and it's like a cascade. And it certainly intrigued me - I think I brought this into the fold. Other people had done similar things, I think they call it bells in traditional jazz. So we inducted it into our vocabulary. You can hear it in certainly The March of the Black Queen where we did it in a very different way: this is Mike Stone again, I remember him sitting there with a whole desk full of harmony vocals. Each note is the three of us singing probably three times, so you got nine voices on each fader. We're singing all the notes of the chord all the time, the way that you get the bell effect is by Mike switching them in. So that's the cascade effect. In Bohemian Rhapsody they're actually sung by that, they're sung, they're not switched. But the principle is the same.