Luna was hurrying towards potions class. Snape would dislike even more if she were late. The year was almost over. She couldn't wait to go home and look for Crumple-Horned Snorkacks with her father.

She turned a corner and bumped in Draco Malfoy. Draco looked more annoyed than usual.

"Get out of my way!" he yelled.

Draco pushed Luna to the floor. Luna looked up from the ground. Draco had disappeared. Luna stood up, brushed off her robe, collected her books and hurried to class.

As soon as Luna had arrived, the door closed and locked.

"Oh, great," Luna said.

Luna tried every spell she could, but nothing worked. She even knocked, but no one answered. Luna sighed and went back to the Ravenclaw common room.

The knocker asked, "Why do love potions smell different for different people?" "Um..." Luna said, "It represents the smell of the things that people love."

"That is an acceptable answer," the knocker replied, "But why are you not in class?"

"I was late," Luna said.

"That answer is correct, but not acceptable. Go see your teacher for detention," the knocker said.

"But it wasn't my fault! I bumped into Draco Malfoy. I was at the door when it closed!" Luna argued.

The knocker didn't reply.

"I strongly dislike that knocker right now," Luna said as she walked back to the dungeons. The door was still shut. Luna tried the knob again. Nothing. Luna sighed and sat against the nearest wall.

Luna waited until the class was dismissed. As soon as everyone walked out, Luna ran inside. The door shut abruptly behind her. Luna glanced her and returned her gaze to the front of the classroom. Professor Snape was nowhere to be seen. She continued to the front of the classroom. There was already a chair in front of Snape's desk. Luna looked around and sat down. The professor appeared almost the instant she sat down.

"Why were you not in class today?" Snape asked.

"Well sir," Luna said, "I believe you are asking the wrong question. You should ask me why I was late. Due to my lateness, I was not able to attend class because the door closes when class beginnings. So, even arriving after being late is possibly useless because you can't get into class anyway."

"Very well then," Snape said, "Why were you late?"

"Well, I was only fifteen seconds late. I know that you are very strict about tardiness." Luna said, "I was almost to class, when I turned the corner and bumped into Draco Malfoy. I fell to the ground and had to recollect my books. That's why I was late, sir."

"So you are informing me that you were not able to attend my class because of Mr. Malfoy?" Snape asked.

"Um... Yes, sir," Luna replied.

Snape thought for moment. He sighed, "Very well then, I will speak to Mr. Malfoy and inform you when you will be serving detention."

"Yes, professor," Luna said sadly, "May I be dismissed? I don't want for be late to Herbology."

"You are dismissed Ms. Lovegood," Snape replied.

"Thank you, professor," Luna said.

Luna turned around and ran all the way to her next class. She arrived twenty-three seconds early.