You've watched the news: Careful! Dangerous patient escaped from the local sanitarium. If you see him, call us immediately.

And still, you decided to walk home alone after the halloween party at your friend's ended. "What are the odds?" you thought.

You got to the alley, one you had to take to get to your house, and there he was—a tall man in a blue boiler suit and a blank-faced white mask. He stood there, watching silently, almost as if he was patiently waiting for your next move.