I had an idea last night.
It was a terrible, dark idea. I woke in darkness and mumbled it to myself as a question before I had processed the actual words. Once said out loud, it had a presence, it was part of reality. It was in the room with me.
I had felt it bubbling at the edge of my mind for months, as though I were perpetually on the verge of some horrible realisation. It made my coworkers stop talking to me and it was the reason my bed was empty last night. I was thankful for that as I stumbled into the hallway, closing the door behind me.
I sat in the dark hallway, pressed against my door. I could feel something pressing back on the other side, seeking a way out into the world.
I must have fallen asleep, because it was morning when I finally opened the door to my empty bedroom. I had left my window cracked open and apparently that was all it had needed to escape.
I stare outside and think about how fast an idea can spread.