guitars, and song structures. i haven't analyzed it, but this sets itself apart from a lot of fuzzy riff music by the fact that it's written in a weird modal key (rather than just building itself up on boring old fifths. those iommi riffs are fun, but they're fucking dead on any level of musicality. this isn't.). love the unexpected intervals that show up in the lead part near the end, but it's the way the riffs shift through the chorus underneath the fuzz like some kind of demented cello that really captured my attention and my imagination...
(relevant track: teenage jesus (viewless), many others)