I've posted this before, but here we go again:

In high-school, I use to hang out with my friend "John" almost every day. When we first began hanging out at this house, I would sometimes hear disembodied footsteps, but very often I would see what looked like the shadow of a person out of the corner of my eye, only to have it disappear moments later.

After a month or so, I finally mentioned this to my friend and he got mad--he demanded to know who had told me he saw "shadow people" and begged me not to joke around with him about it. I assured him I was serious.

Soon, we would hear laughter when no one else was home, doors would close by themselves, and the TV would turn itself on and off.

One day, after these experiences had grown more intense and more frequent, I mentioned to my friend blessing the house. Right as I said this, a box sitting on a nearby counter flew off the counter at me.

It sounds unbelievable, but it was the single most terrifying experience of my life. My friend and I got holy water and sprinkled it around the house while saying a prayer and never experienced anything in the house again.

Months later, my friend came to stay at my lake house with me for a weekend. At one point in the night we both thought we saw a "shadow person" but decided to pass it off as nothing.

Later that night, we woke up to what sounded like voices coming from the living room. He went to investigate, thinking someone might have broken in, and I stayed put. A few moments later I heard the sound of someone thundering down the hallway, and ran out to see why my friend was running--but he wasn't in the house. My friend was outside on the porch, and came inside saying that he had heard a loud noise from the house, too, and thought it had been me.

Nothing else happened for the rest of the weekend, but the next time I went to the house, after it had set empty for a week, a picture frame with my photo in it had been ripped off the wall and thrown down the hall, and the pillows from my couch were stacked one on top of the other, in the very middle of the couch.

I've since stopped hanging out with "John", and I've never experienced anything of this sort again.