Observant as he was, he definitely noticed the young Ravenclaw (Anna) mimicking his posture somewhere next to him. His lips curled into an amused smile but he kept quiet because the door shut closed and the lesson begun.

A soundproof room. Nice. That was sarcasm by the way.

As the others answered the question, Dorian thought that there were some really good answers in them. The answer that the Hufflepuff Prefect provided made him let out a laugh which he quickly cut off by holding a hand against his mouth. But in all seriousness, she WAS telling the truth.

"Bird watching. Because the slightest movement might startle the creatures. Or robbing a house, wouldn't want the owners to wake up just when you're stealing something right?" he said as he pushed himself off of the wall to get closer to the gathered group.