I've recently discovered the joys of the audio book and have been listening at bed time.  A few nights ago I was lying there when I heard little pitter patters of what sounded like tiny feet in the roof space.  I know that sound.  I had visions of opening the loft access and seeing whiskery little faces looking down at me.
The blessing was that it turned out to be the rain on the window pane, slightly altered by the earphones covering my ears!