“My transformations in those days were - were terrible. It is very painful to turn into a werewolf. I was separated from humans to bite, so I bit and scratched myself instead. The villagers heard the noise and the screaming and thought they were hearing particularly violent spirits. Dumbledore encouraged the rumour…. Even now, when the house has been silent for years, the villagers don’t dare approach it….”

Harry Potter and the Prisoner of Azkaban (Moony, Wormtail, Padfoot, and Prongs)