- "Harry's got himself a rogue Bludger!"
- — Hagrid
The house-elf Dobby tampered with a Bludger during the 1992–1993 school year. Its purpose was to injure Harry Potter so that he would be (hopefully) sent home from Hogwarts. The Chamber of Secrets was active and petrifying students at the time. The Bludger caused the Gryffindor Beaters Fred and George Weasley to protect Harry and not watch out for the rest of the team. Despite their attempts, the Bludger succeeded in breaking Harry's arm.
After the game was over, Fred and George struggled to stuff the Bludger back into its crate, as it was still putting up a 'terrific fight.' Dobby later revealed to Harry in the hospital wing that he was the one who tampered with the Bludger, and apologised for setting it on Harry, which contradicted to Harry's earlier theory of Draco Malfoy being the culprit for being a poor sport.
Behind the scenes
Hermione destroys the Bludger.
- In the film adaptation of Harry Potter and the Chamber of Secrets, Hermione Granger destroys the Bludger by using the Finite Incantatem spell right after the game, when the Bludger continues its assault on Harry on the ground.