So, I've been working on a metal mix for Jessamyn from MetaFilter for a while, long enough that she probably just thinks I flaked. But it's totally been an excuse to explore stoner metal for me again (well, and for a while, I was gonna make her a giant cheese metal mix and present it seriously, which I may still do— I found some terrible airbrushed picture of a turtle fucking a girl on a beach that seems like it would be the ultimate alternate universe van decal).
And in there, one of those Ur-sources of stoner metal: Atomic Rooster's "Death Walks Behind You." It's right at that junction where blues+drugs=metal, and has this awesome, plodding groove behind it. Maybe the album's available over at Cousin's Vinyl.