So, I’m sitting here in room lit only by candles, listening to an invocation of the demon regent Asmodeus, when suddenly this roaring noise that’s not on the CD starts up. It sounds like some of the sound effects they layered behind Regan’s voice in in the exorcist – a dreadful, bass screaming, spiking to weird whining sounds…

It lasts exactly as long as the invocation, and it was a singularly weird experience. It took me a minute or two to realise that what it actually was – my upstairs neighbour drilling something. But he wasn’t drilling before, and hasn’t drilled since…