I was listening to Dave Grohl's Probot CD (the project where he recruits all of his favorite 80s metal icons to join him on CD - where he plays most of the instruments). The last track (with King Diamond) came on, which was decent enough, and then there was a long silence - the kind that leads up to a bonus track.
Then, on comes some of the best stoner/doom (as it's called) metal riffing - a la King's X Dogman, for instance (lots of the tritone/octave/fourth/octave action going on). Then come the vocals - completely ridiculously over the top, but in a pretty good way. The bridge comes - some decent riffing again, and some nice 3-measure repeated harmonised background vocals (go listen, why am I describing this to you), then a pretty good chorus that varies on the original riff.
And so, I finish writing up a far too detailed writeup for a Dave Grohl and Jack Black collaboration that was, really, a lot better than I'd think it could be.
Currently seems to be on youtube here: http://www.youtube.com/watch?v=25Ewd_fpETI