Brilliant Room of Rooms
Battle of the Department of Mysteries
Ministry of Magic Department of Mysteries
As a member of Dumbledore's Army, Ron Weasley joined Harry Potter and four other students in the Battle of the Department of Mysteries. Accounts of the fight with Death Eaters note that Ron fought bravely before becoming confused by a spell and accidentally interacting with a brain in the Brain Room, which incapacitated him. He recovered later to learn the outcome of the ongoing fight.