I rented a house that you could hear footsteps and a light switch clicking over and over. I heard it as did my wife. It was not imagination.
In the same house with the harp, my Sister saw many many odd things. I saw a few others, but the really unexpected thing was our Brother, a devout atheist, saw so much he (like ayersy here) couldn't process it and he left.
Here's a short list:
hear the bicycle of a roommate pull up, very distinctive sound. You remember the 10 speeds in the 80's? Here all the normal sounds of him putting it away, up to and including the doorhandle to the inside turning. Nothing out of the ordinary. Except no one was there! Until 5 minutes later, when Clay did the exact same thing, like always.
That was the final straw for my brother, who checked out the first "arrival" thoroughly. So ayersy's theory is now shot full of holes.
Water faucets would turn on full blast, and turn off just before you could do so, so many times it's hardly worth a mention. Oldest trick in the book
Same thing with the radio. And alarm clock / radio. Troubling thing about this is when you turn away and it turns back on, it's not necessarily the same station. How's that work Ayersy?
Wendy, the harp player, was crying, at her harp. I don't know why. Her hair gets pushed back from her face, and her tears wiped away. No one is there.
Why my Sister and I hear it (same harp, different time) being drug across the floor, and when I take a look the top of it is above the door to Wendy's room, looking for all the world like a human head crunched in the closed door I don't know. I do know all points of entry were closed and locked from the inside, and all possible hiding places large enough for a person were checked
thoroughly, and empty.
Go ahead and explain
that away ...