When I was a young child my mind had – and still has – an uncanny but undesirable ability to remember scary, dreadful things just as I was trying to fall asleep. Literally, as I felt myself start to loosen, I would be snapped awake by the image of a grinning, menacing rocking horse that was moving independently (when I was five) or a collage of swirling, terrifying news bytes which happen to be true (last night).