Deep in the jungles of Laos and Thailand, where the trees grow thick, daylight feels like night, and an eerie silence follows you everywhere, there is a sound that can make your heart stop. Koi…koi…koi… It echoes softly through the forest, not loud, not aggressive, but just enough to make you uneasy. This is not…

When I was a little kid, I read an article on the penanggalan legend in Southeast Asia in one of those dodgy mystical books that were popular in Malaysia at the time. It described a ghost whose head floats through the night, with its entrails hanging beneath it. And when it laughs, if the sound…