The bed vibrated as if on some sort of mechanical device and her body shook and convulsed as she tried hard to hang on to the sides to prevent falling off. She sensed that the room was still pitch black and she knew she wasn’t alone. She couldn’t open her eyes, they felt glued shut and anyway she was too afraid of what she might glimpse. Faster and faster the bed vibrated beneath her making it almost impossible to keep hold of the mattress. She prayed for it to stop but knew it would be a while longer. It always went on for an eternity, it seemed and then, just as suddenly, all would be still. And the terror would begin.