Severus regarded Joce as her hand rose and he indicated for her to speak. He listened and said "Precisely, Five points for Ravenclaw," he said reluctantly. He began to move on explaining each picture in turn until he stood at the front of the classroom again. He regarded the class with his cold hard eyes, "you are, I believe, complete novices in the use of non-verbal spells. What is the advantage of a non-verbal spell?" He asked regarding the room again. His eyes landed on Ed.<br/><br/>"Mister van Daal, tell me what is the advantage of a non-verbal spell?" Severus asked cruelly, knowing that Ed would have no idea. Ed stared at him with a startled expression, never wanting to be called out in one of Snape's classes Ed had been studiously ignoring everything and writing furiously on the paper. Some of it was notes, some was little doodles. Severus made hsi way to Ed's desk who quickly hid the doodled on page beneath the stack of parchment, but not quick enough.<br/><br/>"Shame shame van Daal, detention," Severus said with a small dark smile as he pulled out the doodled upon page, "anyone else?" he asked regarding the room studiously ignoring Hermione's hand that had shot up in the air.