Evelyn watched the scene in front of her, fascinated that the Professor could do that with the stones she held in her hand. And someone literally just spoke her thoughts on the matter. "Yea...kinda like the imperius curse." she said, slightly becoming wide eyed at her own repeated answer. "Although, he knows what he's doing. Right?" Then, it wouldn't be illegal? Unless it was....

OMG forget the fact that the Slytherin just disapparated in Hogwarts...it was another Professor Duckfeet moment!!