Ah, Fuan No Tane. I found that, in order to really get the full effect, you have to read a whole shitload in a row- after a while, it goes from "WTF" to "kind of creepy" to "holy shit get it away!"
It still drives me nuts how none of the stories seem to have anything resembling an explanation of what the fuck's going on. I'm well aware that that's an intentional part of the effect, but it still drives me nucking futs.