Persistence of Memory

Do not, if you've never made it a habit, decide that today is a good day to close the bedroom door before lying down for a nap (short or extended). Yes, yes, we know you did it because you wanted to maintain the level of darkness in the room, and Mr Shadow and Miss Storm have a habit of gliding in and out and pushing the door wide open, thus letting incidental light from the hallway to spill in, or the kitchen, or the bathroom....

You see, Mr Shadow will sit outside said closed door and mew plaintively, without ceasing, until you guiltily get back up and crack the door open.