The man (Professor Milward) replied, "What should you know ahead of time? Professor Armstrong"—the Defence teacher—"is on the roof of the boarded-up petrol station, Disillusioned. He’s either got a sniper rifle with him or he’s doing something advanced with the Banishing Charm. DEs are getting holes put in them, but there’s no sound and no muzzle-flash. The Death Eaters still alive are pissing themselves. The DEs are trying to destroy that south west wardstone, but"—professor Milward’s smile was cruel—"these mudbloods aren’t making life easy for them."