Horror movies can give a fright, but so can a good ghost story. Suspense is all about timing and gullibility—and if you can pull off both, you've got a hit. But what happens when the lines between fact and fiction start to blur? You often hear stories of people claiming that they've seen ghosts, aliens, and/or other supernatural beings. If you've turned on the local news, you've definitely heard about a grizzly murder or two.