By the time he was cautiously approaching the tapestry of Barnabas the Barmy and his trolls, his eyes fixed intently on the wall opposite, Harry’s ankle was throbbing again, and he was walking with a distinct limp. The sick feeling in the centre of his chest only intensified when, with only the faintest sound of shifting stone, the door to the Room of Requirement melted into existence - Draco was already inside. He proceeded with a calm he wasn’t truly feeling, pushing the door open, limping over the threshold, and closing the door behind him. He paused only to think intently "I need this room to be inaccessible from the outside, I need this room to be inaccessible from the outside, I need this room to be inaccessible from the outside, ’. He faintly heard it click as it locked closed, and he turned his attention to the room in front of him.