One minute, you are in your house. The next, you're standing in a living room surrounded by three demons. They drop their Ouija board and scream as they run to their bathroom and lock the door. "I told you we shouldn't have touched it!"
After hitting your head, you've seen most people as these horrifying and ugly beings as if they had suddenly lost their masks. The crazy town hobo notices you gawking one day and asks, "Wait, you can see them too?"