Things did go a bit awry when the dark wizard started to use more advanced spells, more dangerous spells. Some of these spells had a number of the other students hurrying away to get out of the pictures. The professor tried to interfere although things went truly awry when the killing curse was cast at the professor. Or would have been cast at the professor, but was instead hitting the wall as the wand was all of a sudden flying out of the dark wizard's hand. Thankfully only Clark would have seen that it had been Aris casting the wand away but he would notice that she hadn't even spoken the incantation or even moved the hand that was holding her wand.