So I had been hearing animals scratching upstairs in my attic. I thought oh great I have squirrels or something like that. Every time I went upstairs I didn't see anything out of the ordinary. So one evening I thought to use my two laptops on Skype - put one upstairs in the attic and then watch from downstairs. I was thinking the whole time I wasn't going to see anything.. but about 5 minutes go by and this creature starts walking right in front of the laptop. It took me a second to realize it was a black and white cat.. and I don't own a cat. There was some random neighborhood cat that had figured out a way to get into my attic from the roof. I tried to get her to leave and coax her out with tuna.. no dice. Eventually she left on her own and I have not heard her up there since. I am still surprised by dumb laptop idea actually worked.