There aren't a lot of places creepier than graveyards. Why? There's something about a large collection of occupied coffins and tombs that makes everyone a little uneasy. Besides the idea of the dead (or undead) that gives graveyards a scary connotation, there's also a certain fear that keeps some people up at night: being buried alive. It's not fun to imagine, and (I assume) definitely not fun to experience. In the past (before certain developments in medical/post-mortem tech) the fear of being buried alive was not entirely unfounded. This fear drove people to innovate new ways to ensure that in...