Harry Potter
Harry went out of classroom as soon as the lesson ended. He was absolutely sorry for that mistake that he accidentally made. He didn't actually mean it but the Ravenclaw seemed to be really serious towards this. Well, she was right. If it were Harry that suffered from this, he would be probably kill that person straight forward.

He ran to look at every corner of the corridor but there was no sign of the Ravenclaw. He looked around, starting to panic. He did not want to be hated by anyone, not even someone that he didn't even know. But then suddenly he felt really dizzy and nearly falling onto the ground. His head was like going to explode in one or two minute. It was so painful that he could not stand.

That he knew, the man was doing it to him, again.