That Sounds Familiar

Welcome to a(nother) new section of this blog, That Sounds Familiar, in which I give you two pieces of music that sound awfully familiar. (And yes, I'm going to retroactively apply this tag to the Mass Effect/Babylon 5 post and the Rains of Castamere/For A Few Dollars More post.)

Anyway, there's this...

And then this...

The Iron Maiden song was written by Adrian Smith, who borrowed the opening riff, with permission, from a good friend of his in White Spirit. That friend was... Janick Gers, who replaced Smith when he left Maiden.

Small world.