A blanket doesn't automatically make things more sinister. Just warmer.
Madness string 3149
Some corners don't have a concealed anything. Most corners don't. This makes it worse. Eventually you get so used to a big, safe nothing that when the plasma bolts fly it's a "Nearly spilled my tea!" shock.
So I'm sitting in the Gravy-Tree. And my shadow is walking up and... licking my tree?