Do you believe ghosts are possible? If not, what do you think people's experiences of ghosts actually are?

I've experienced multiple paranormal events in my life that I, or my family, were never able to explain. However I don't think they were "ghosts" in a sense that they are spirits of the dead walking around my house. My best guess is that paranormal activity is just a phenomenon that occurs when thin spots in the space/time fabric show up and cause multiple realties to exist in the same spot simultaneously. So what you are seeing is other people, or even yourself, in another reality or time. Then similar to a bad TV signal you sometimes get a crystal clear picture with sound, and other times it's all broken up and you have to interpret it through the static.

How do these things spots show up? No clue. But in a universe where black holes, and other similar things, are possible it is a lot more believable to me than ghosts or demons being the culprit.