My Uncle used to live in a flat above a Devil Worshipper - they had some strange things happen there, including Growling (sounded like a bluddy big dog, but they didn't have one), faces appearing and disappearing on the walls; apparently there was some trouble with my cousin as a baby whilst they lived there, but no one in the family would ever 'elaborate'.
Needless to say, they moved out ASAP!!!
The Guy who lived below, apparently drove his girlfriend insane when she left him!
btw, this is no BULL!
On a lighter note, an elder that I knew in my troubled past was given an old piano, that eventually they smashed to pieces, saying that they could hear it 'playing to itself' occasionally at night! Freaky.............