When I was little, in my aunts house I followed around a cat all the time. It always walked through the wall though, and I couldn't ever figure out why... But, my aunt didn't have a cat. No one believed me, since I was only 5 or 6 until my aunt was walking through the house one night and the cat ran by her... Hah.
At my cousins old house up in Cleveland, the previous owners family had left a lot of his stuff in the attic after he passed away.. My cousin decided to start going through it one day, to see what she should get rid of, all that.... She went down stairs to get something and she heard what sounded like something being throw in the attic... When she went back up, papers were everywhere, boxes were turned over... Apparently the previous owner had passed away in the house and didn't like them going through his stuff, cause this happened anytime they started to.
Every time I would walk by the stairs to the attic, the hair on the back of my neck stood up and I felt like someone was watching me... just a general creepy feeling..
In the same house, the bathroom door would lock from the inside when no one was in there, and the bathtub would get turned on and fill up until it over flowed. That happened once when I was there and it scared the shit out of me... Also, when we left, we made sure to turn every light in the house off, and as soon as we step outside and look at the windows, the lights are back on.... They finally moved when they felt their daughters started getting really scared and felt like they were in danger. Crazy shit