I found a sign in a coatings and resin plant that said "DANGER: CONFINED SPACE. DO NOT ENTER WITHOUT PERMIT FOR CONFINED SPACES or something like that. Never seen a room so dangerous you needed a permit just to go inside before. I can't find the pic though, and it's a cell phone shot anyway, so here's another picture from that plant.
YOU NEED THE PERMIT. THE OWL IS WATCHING.