I was so deep into my thoughts that I didn’t realize that everyone was already packing up and leaving the classroom. I sat there and slowly started to gather my stuff together while waiting for everyone to leave. Once the door closed, Professor Snape went to the cabinet of completed potions. Ones made by him for comparison. He set the potion on his desk and grabbed another piece of parchment. He looked up to me and solemnly said, "your potion was perfect, they always are, but I have to make sure. What was on there was..  disturbing . As I am sure you’re aware."