Oliver: Uh-oh. Harry: What is that? Oliver: Bludger. Nasty little buggers. ‘The Bludgers rocket around trying to knock players off their brooms. That’s why you have two Beaters on each team. The Weasley twins are ours – it’s their job to protect their side from the Bludgers and try and knock them towards the other team. So – think you’ve got all that?’ ‘Three Chasers try and score with the Quaffle; the Keeper guards the goalposts; the Beaters keep the Bludgers away from their team,’ Harry reeled off. ‘Very good,’ said Wood. ‘Er – have the Bludgers ever killed anyone?’ Harry asked, hoping he sounded offhand. ‘Never at Hogwarts. We’ve had a couple of broken jaws but nothing worse than that.