THEM

There's a strangeness about them. If you looked at them for a while, you wouldn't be able to say what, but then again you probably would not look at them for a while, and would look away and at something else but would not be able to say why, and would tell yourself it was because something else had caught your eye.
They pass as human and they walk amongst us, and you will have passed them, or hoped they did not sit next to you on the bus or the train, and if you walk by one on the street when it's dark the hairs on the back of your neck will stand up and you will have to fight the urge to run. Anyone watching would wonder why you seem to shiver and walk faster, because all they'd see is you and a small man who offers no threat reading a bus timetable, or a woman sat on a bench, looking as if she is waiting for a friend.