I don't believe in ghosts... but for the "lingering energy" theory, I have two anecdotes.
1) The haunted chair. When I was in H.S., a kid in my church group had a party at his house. Which was exactly as fun as it sounds. And at one point during the party, seeing us all drifting, he said something to the effect of "hey! We have a haunted chair! Check it out!"
The chair was a design I have Googled many times over the ensuing decades; apparently it's a not-uncommon antique Chinese chair style that has two snakes coiling up from the back legs to twist into the chair's back. This one had the snakes' heads emerging from the back to form the arms, and was beautifully carved with fine scales all over and detailed faces complete with what looked like mother-of-pearl for the snakes' eyes. It looked exotic and wholly out of place in this kid's 1960s rancher.
I said exotic, fine, but haunted? And this kid, who was younger than me and I understood was trying to impress me, reeled off a list of strange happenings he claimed around the chair: It sometimes moved around the house on its own; the one person they'd ever tracked down who claimed to know what it was (a sterotypically strange and musty old Chinese character I recognized a few years later when I saw "Gremlins") backed away from their picture of it and told them it was an executioner's chair, and evil; it was nearly impossible to photograph; and the eyes turned red when you rubbed the snakes' heads.
BullE36 M3, I said, and started rubbing one of the heads. The eyes turned red, all right, and it was not just a color change; they seemed to light with a fire that was alive, malicious, aware--and made me very uncomfortable.
Which is probably why it suddenly became very important to me to debunk the kid's entire story. Obviously he was trying to impress me, and obviously the story was crap--who keeps an evil chair in their house that moves around at night?? Fortunately I had the perfect weapon to prove him wrong, a Polaroid camera I had just bought myself to document all those not-to-be-forgotten H.S. moments. It was in my friend's car, and I fetched it. And stood myself in front of Mr. Evil Chair to snap me a picture.
I don't actually remember taking that first picture, but I do remember gradually realizing, as I flapped the developing photo back and forth, that the chair wasn't in it. Uhhh. Must've gotten distracted and snapped the wall above it, because the photo only showed a blank expanse of green paint.
I do remember taking the next picture, and the next and the next, until the rest of my pack of 10 expensive Polaroids was all used up. And I remember shaking as I shook those developing prints, not so much that anyone would notice except me. Most of all, I remember the sound of the little motor pushing those photos out of the camera, because it had gotten very quiet in the room.
The chair WAS in a few of the shots--upside-down, wavy, blurred like it'd been shot with crazy filters--but others captured impossible stuff: the wall behind me and the picture on it, I remember especially.
And here's where "real" ghost stories are different from the fake ones. Once I was out of film, we all said quick goodnights and left. All of us just walked away from the whole experience. We didn't talk about it. We didn't tell anyone about it. I felt like I had seen something I wasn't supposed to see, something malevolent that I didn't want to follow me. So I threw away the "proof"--the photos--and not long after, when I picked up that Polaroid camera I had saved to buy and looked into the viewfinder to find a spider curled up in it, I threw it away like I'd been burned. It was years before I even tried to tell the story.
I rarely do tell it, because for one, telling ghost stories makes you sound a little unhinged. More than that? Any real experience is not something you want to revisit, even if it's only a creepy piece of furniture you ran into once. I'm still a little afraid, so I push that story down under the other, lighter ones. This is why I don't believe most ghost stories--they tend to be so over the top, and I can tell you, it only takes the tiniest tilt to your world to make you never want to think or talk about it again, never mind tempt fate by calling it out.
Story 2 is for another time, because I am done with ghost tales for tonight.
Margie