Of course, it had been innocuous in the beginning. Luna had come down from Ravenclaw tower, absently rubbing her left arm following yesterday's incident, lost in thought. The entire situation had her preoccupied. Why had she done what she had done? What did this mean about her and Bella? Naturally, she was so lost in her own head, that her surroundings were completely absent from her. Of course, this was the catalyst for a disaster. One small incident would sideswipe the poor girl, landing her in a situation in which she was poorly prepared to handle.
Her steady gait down the corridor echoed with the clacking of her trademark boots. The sun shone through the windows, illuminating the hallway. So she really had no excuse for the collision. But in her fog, she bumped right into the red-headed Gryffindor. The impact startled Luna out of her introspection, and she glanced down to see the victim of her carelessness on the floor before her.
Her pale skin immediately flushed red with embarrassment at her own obliviousness. She reached out her hand toward the girl in an offer of assistance. "OH! I'm so sorry about that. Let me help you up."
Knowledge is a weapon. I intend to be formidably armed.