Eerie: I Have No Supernatural Powers, Yet I'm on a Killing Spree!

Are there really ghosts in this world?

Believe they exist, and they do. Don't believe, and they don't.

What do you think?

I don't think there are any ghosts in this world.

Then why do so many people say they've seen one?

Because what they saw wasn't a ghost, but something uncanny.