What's that word?

Here's a bizarre story about a teacher that assaulted a student with a dumbbell, chanted die, die, die and says he thought he had killed the student. He also describes feeling really peaceful following the attack and wanting to gouge out the eyes of someone who was looking at him prior to the attack.

Jurors have heard that the victim was regularly in trouble for disrupting lessons and classmates had filmed students calling Mr Harvey a "psycho" in the moments before the attack.

Gosh, I can't imagine why they would call him something like that.