Dream of child, children

I had a dream that i arrived at school to pick up my 6 year old son. during his day at school a hypnotist had done a special show for the children, and had hypnotized a child to be possessed by some demon or spirit. the child's teeth had gone pointed and he was talking in an unknown language and making strange noises whilst stabbing himself in the eye with a pen. people around watched him but didn't think this was wrong. i tried to catch the child to stop him from hurting himself but i couldn't and people just thought this was funny and the hypnotist said good bye to everyone and left the boy to continue hurting himself and wouldn't listen to me when i wanted him to recover the boy.