I woke up in the bedroom of the Airbnb, to a malevolent presence holding me tightly down to the bed. I couldn't move any of limbs at all, such was the force at which it held me down. I tried to shout at it, but couldn't speak. All I could manage was a kind of muffled grunt, in a vain attempt to fight back or call for help. Eventually the presence stopped, and I could move my body again. The room was empty and still. I'd just had my third ever experience of Sleep Paralysis, and probably the wo...