Oh, god. I've had those. A lot. Not at home, mind you. Mostly on Auraria Campus. Holy hell that place is haunted.
There's a "cabaret" down in the basement, that used to be a bar. Well, one day, my friends and I went down there, since we'd heard it was haunted. We were recording on one of my friend's camera phones, and we start hearing what sounds like piano music. Seriously. Like, old swing and jazz tune type stuff. And glasses clinking. Now, this would be easy to explain as outside influence, but there are no pianos in the entire building, and no glasses, either. So, we start getting a little creeped out. Then we start hearing voices. Nothing clear, just indistinct chatter as we walk around. I was the first one to notice that it suddenly felt like it was very, very chilly all of a sudden. So, we go back a little further, to what look like storage cabinets and stuff, and I reach out to touch one. As I do, my hand gets jerked down, off the door. When we went back and looked over the video, you actually see my coat's sleeve move like something had grabbed it. Also, when we went over the recording, right after I did that, you hear something...male, sounds like, possibly demonic, say to "GET...OUT..."
Anyways, we hadn't heard anything at the time, so we keep exploring, going back out to the main bar. Well, my other friend goes back there, and he starts kinda screwing with the old taps. He says something shocked him, and then as he gets out from behind it, he starts falling over and his speech starts slurring. So we leave, but we see this white...looks like a hand with a wrench in a missing ceiling tile.
We went back over the footage, and we realized that all along, there were only three of us. But when we all are stopped, there are distinctly another set of footsteps that keep moving. Also, at one point after I tried to open the door, my friend's camera suddenly blacks out for a few seconds. Audio's still working, nothing moved in front of the camera before it went out...then it came back on.
And that isn't even the scary one.