I was about 5 or 6 or so, and my sister had left her TV on. We had basic channels, no fancy cable or digital crap, so this was on regular television.
I was in my bed across the room, but I could still hear and see it. I'm...pretty sure it was a metal video (I could be wrong, of course).

It was a clay-mation version of Little Red Riding Hood. At some point, the wolf is caught, of course, but whatever has him is tearing the hell out of him. Torturing and (Possibly) murdering him.

Now this, to a six-year-old before bed, was scary as all hell.
I never forgot exactly what it entailed (Violence, violence, violence), but I never found out the artist or song that went with it.