I remember listening to Alice Cooper Welcome to My Nightmare... don't remember which song Steven maybe... but the mumbling voices in the background freaked me out. I thought some people were outside my bedroom window. I got up to look before I realized it was on the album.
A German band "Krieger" who were around in the 00's caught my attention due to their extensive use of slides on distorted guitars and bass. At that point I had never really heard slides being used on guitars in this genre of music, and I was (and still am) totally hooked to the sound.
Their entire album is pretty good and is full of that style of playing.