Yeah I have had bad experiences too. I used to live in a neighborhood that had a built in cemetary in Montgomery and when I was home alone I would hear the strangest things. I would hear people talking and walking up and down my hallway and I would hear someone knocking on my wall. My mom told me it was a bird that probably came in through the cimeny (sp?) and was pecking the wall. I don't think so. I believe I know the difference in sound and how likely is that to happen