I can recall this scene that traumatized me when I was around 6 years old.  A little boy is awake in the middle of the night, he walks outside by himself for no reason that I can recall.  He finds himself behind what I assume is his house and wanders into an opening to a storm sewer or something.  In the sewer he finds himself looking at a skinless person or monster.  Dripping with slime or blood.  I think it was a monster… that was 25 years ago.