Not that long ago, while talking horror movies with an Asian film critic, I mentioned that ghost stories (especially the Japanese kind, where spirits haunt the living until some unresolved injustice from their past can be rectified) don’t really scare me, because ghosts aren’t real. Oh, but they are, she insisted, suggesting that she may have encountered them herself. What my Chinese colleague can’t understand is Americans’ obsession with slasher movies. Now that’s a genre that does nothing for