F is for Footsteps

Many of us have heard them. Footsteps. In the attic. Or the next room. We could be awake or asleep. We check our surroundings and do a quick inventory of who should be in the house and where they are. You conclude everyone is accounted for. Except for whoever or whatever is making the footsteps. 
You sweep the house and check for burglars. All is well. Until you her those footsteps again. Along with hearing voices, audible sounds like footsteps are downright spooky. 
My wife is a CNA...