Well...read my latest journal, for my answer to that. There's something weird going on in the house my roommates and I live in, and I've got video and a photo of some rather...odd...things.
That's not to say I don't believe there's nothing there. I think it's a combination of some people's imaginations (ie, ghost tours I believe most of that is a result of people expecting to/thinking they will encounter a ghost) and that there is actually something there. I just don't believe that they're spirits of the deceased. I believe it's something else.
I don't know what it is, I just don't believe they're people who have died. I think that's just something that has come about over thousands of years of people just no wanting to believe the dead have actually left this place for good (that's not a bad thing, I just think that's where it comes from)
Once, I was with some ...friends(?)...in a reserve. Nearly two years ago. It was dark. And there was this black sheet thing that was interfering with the photos we were taking. It was annoying. Then we went back to the house, and my friend's mum said she saw a flying black sheet thing fly through the living room.