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No hard rock about it, this is just a heavy metal song.

they openned wit hthe Rover the whole 77 tour and also can be heard on the Chicago 73 soundcheck

I marked that piece of trivia with a cite needed tag for now. Aaрон Кинни ( t) 03:19, 19 December 2006 (UTC) reply

In the section "Musical Structure", the article states that the riff is in the key of E major, while the solo uses a F# minor scale.

I might be wrong, but I think the whole song is in E major. The solo uses a F# minor scale and a C# minor scale, which corresponds with E major being the key.