"Detentions were standard at first, but then Alecto reintroduced the Cane, quickly followed by the Dunce’s Cap as forms of punishment. Only, this wasn’t your ordinary Dunce’s Cap. This one was a helmet stolen from one of the suits of armour, and one of the Carrows installed a set on spikes on the inside. They didn’t quite touch your skin, unless you moved. And standing in front of the class for the entirety of a two-hour class with a heavy lump of steel around your skull will make even the most robust of heads bow eventually.