So my brother came back from China, and of course he bought me one of those Chinese Lucky Cats. Those that just sit and wave at you, powered by a battery.
Now, I was sleeping in my basement room. I awake suddenly, with that feeling that something was in the room, I pretty much jolted upright, grabbed my phone and shone it around me. Nothing seemed out of the ordinary, that damn cat was by my bedside waving it's stupid arm. I thought nothing of it, and went back to sleep. When I awoke the next morning, I realised I took the battery out the night before.
TL;DR: Haunted by a chinese factory worker, probably.