"Here you go, Professor," Harry said quickly as he jogged to the front of the dimly lit dungeon, handing Professor Snape his assignment on the creation of bezoars.
"It's about time," Snape replied, scowling as always, "Next time I will not be so lenient about late work."
"Professor," Harry began, "It's not late, it's only two minutes past the end of class, the rules say we've got five --"
"Harry!" Hermione interrupted, standing at the doorway, "We've got Divination next, we can't make it up the tower in time if we don't leave now!" Harry stifled his exasperation and hurried up the stairs with Hermione, walking briskly to make up their lost time.
"What was taking you so long anyway?" Hermione asked, "I mean, it's quite a simple process really, all that happens is that..."
Harry wasn't paying her a drop of attention to Hermione when he interrupted her to say, "Hi, Luna," as she walked past them on the way to Divination. Hermione looked at him quizzically.
"Were you listening to me? You talked right over me when you said "Hello" to Loony, er, I mean, Luna."
Harry realized how he had just acted. "Oh, I'm sorry, Hermione, my brain's a little burned out from Snape's class." He didn't tell her off for calling her "Loony" but felt an intangible itch whenever anyone called her that.
"I'm just trying to help you, Harry," Hermione replied, "I know your grades aren't the best, and we have a test tomorrow. I'd hate to see you fail."
He always knew she was a true and loyal friend, and this instance only further confirmed it. "I know, Hermione, I'm sorry," he said, slightly ashamed, "So, what were you saying about bezoars?"