Ahh so creepy!! My MIL's house is super creepy. Totally haunted. It sealed the deal for me when my dog started doing his low growl (usually reserved for bears and the like) at her pantry, which is where she has seen the most activity. No thanks! I'm out!
I've enough experience with creepiness it doesn't really bother me that much from the dead or whatever they are....it's the living and physically tangible ones that will get me to grab a pistol and cock it.
I have some strange and deeply scientific theories on why things like that are heard and seen, but it's a bit much for most folks to discuss quantum physics so I generally don't lol