I have observations of this canine behavior I have logged in my ongoing journals that I compile for my lengthy database. It might be planning something. If it is a cunning individual concocting a plot of massive destruction and it wants to evade attention or punishment this could potentially become a chaotic situation. We need to take the canine to a veterinary psychologist just to be safe and I would make sure you protect the couch with furniture protector film and set up a spy camera while utilizing booby traps.