What I'm listening to today: "Scorn"
Portishead is one of my favorite bands ever and probably my fav track of theirs is "Scorn", which I'd describe as "Glory Box" turned inside out. (That description probably won't make sense unless you've listened to Glory Box a lot.)
The track is pretty hard to find; it's on a 10-track Dummy remix/outtake compilation called "Glory Times" and, inexplicably, in the background of one scene in the 1996 Wiccasploitation film "The Craft".