John McGlashan principal Michael Corkery said: "He was doing what every kid should be doing, playing with his friends in a river."
Everybody had done everything right, but Dion still died.
"It was just a tragedy, and tragedies happen. Life sometimes deals out bad luck but we have to get on with it. We'll never forget him."
Too often, people respond to a child's tragic death by setting up a pressure group, foundation or new law to Make Sure This Never Happens Again.