I think there's a ghost in my house

[Norse]

for those of you who don't WANT ghosts, get a pet. all noises and movements can then be blamed on pets and you can sleep better knowing it was the cat or dog who made that strange noise.

That works great, unless all the pets are in the bedroom sleeping with you and one of the cats looks down the hall with her "there's an ax murderer in the house expression"!