Dream of child

The dream was when I was a child in third grade. It was a nightmare and during the nightmare, I dreamt that my teacher had magical powers and that she was a witch. But, instead of being a good witch, she used her powers to hurt her students. One day in class, she picked me to be the victim of her powers. She pointed her finger at me and suddenly I disappeared only to reappear moments later trapped inside a mirror on the other side of the room. Then she took the mirror off the wall and smashed it to pieces with me still trapped inside. Then the scene became black and the pieces of the mirror where I was seen fell into a black hole.