Once he was allowed, Forrest entered the office as he still dragged the vacuum cleaner and took a moment to catch his breath. Once his breathing was eased a bit, he placed it down careeeefully and looked at the man.

"I wanted to return this," he said as he offered him the hose. He didn't wait for a reply though and simply went on excitedly with whatever it was on his mind.

"And what's the bronze knocker in entrance of Ravenclaw common room? It's not a computer because Amelia told me it thought of new riddles every day. Every day! And not even once the same riddle. Computers aren't that capable. But it can't have a human inside it, can it? It's--" he trailed off as he thought it over. It was gross before anything else... he made a face and looked up at the Professor expectantly.