The man's first shot catches her right through the chest. Bang! And a second rips through her head.

Or was that the stranger's? He only fired once.

When the body hits the ground he glances behind himself, surprise and horror on the same face. He knows damn well what the young man's been up to to have been able to do that, but he can... walk, talk, shoot all right...

... must not have been using for long.

"You, too," he repeats. But there's no anger behind it. Call it the neutrality of the scientific method.