A boy is deliberately fouled by an opposing player (under the instructions of his unscrupulous coach) and is knocked unconscious. He's taken to hospital as precaution but is later seen to be fine. He's regained consciousness before he's carried from the ice.
A minor scuffle takes place inside a classroom.
Mild hockey violence.
One of the players is tied up to a goalnet and he is hit with hockey pucks (as a silly exercise during practice, not bullying)