Beware every space you walk through or touch in this city. Doors, gates, arches, windows, picture frames, the open mouth of a statue, the spaces between shelves. Beware any space bounded on all sides. All these are doors to other places.
Wow, we are nearing to a point where the old saying 'Computer does not do what you ask it to do, it will do what you tell it to do!' is becoming obsolete. The future seems to be more along the lines of: 'Computer only does something if you ask nicely, it feels like doing it and it doesn't violate any of the million rules it has!'