Harry Potter and the Deathly Hallows: Chapters 24-28
A funeral, a bank robbery, and a dark secret revealed
Harry leads one of his signature chaos attacks on Gringott's bank. It starts when they sneak in using the old invisibility cloak, then ends with a blind dragon dumping them in a lake. Then it's back to Hogwarts via Hogsmeade, with a quick stop on memory lane, courtesy of Dumbledore's shady brother.