What did the brain do to Ron?
What did the brain do to Ron? Ron Weasley got struck by a curse before this that made him act rather drunken and stupid, and made his brain fuzzy, so he foolishly summoned a brain out of the tank. The brain burst from the liquid, and as it spun toward Ron, what looked like ribbons of moving images flew from it, “unravelling like rolls of film”.
What was behind the locked door in the Department of Mysteries?
The Love Room was behind a door that remained locked at all times and which could not be unlocked by Alohomora or magical unlocking penknives. In the room was a fountain or a well that was believed to hold a deposit of Amortentia, the most powerful love potion in existence.
What happened to Ron Weasleys arm?
Ron Weasley failed Twycross’s class, which would come back to haunt him in Harry Potter and the Deathly Hallows – caught in a dangerous situation, he tried to Disapparate without a licence, and ended up Apparating with a huge chunk of his upper arm missing.
What was the door in Order of the Phoenix?
It’s a boundary between life and death. Not much is known, but Pottermore has a decent write up here: Last, but certainly not least, is the Death Chamber.