You know that riff that every metal/hard rock band plays? You know the one.. it sounds vaguely like this MIDI file. I call it the Diggety Dank. Because that's what it sounds like. The music sounds like someone should be chanting:

DANK DIGGETY DANK DIGGETY DANK DIGGETY DIGGETY DIGGETY DANK!

Examples in roughly chronological order:

Jeff Beck Group, "Beck's Bolero"
Led Zeppelin, "How Many More Times"
Black Sabbath, "Black Sabbath"
Deep Purple, "Child in Time"
Led Zeppelin, "Achilles Last Stand"
Metallica, "Am I Evil" (bonus track on reissued versions of the "Kill 'Em All" album... not sure where else it might be available)

It (apparently) started out as a Bolero, but somewhere along the way picked up associations with Holst's "Mars the Bringer of War". It's usually not played in 5/8 time like Holst's version, though. (Listeners who don't know anything about Holst probably think it sounds like the Imperial March from Star Wars, although it doesn't really)

Does this thing have a real name?