Since there was no teacher to disarm the kid, or social worker to convince the kid to put down the knife, I say it was a good taser.
Kid will think twice before killing himself and his sister, next time.
Notice — stepdad
LOL. You made me recall a great Jim Carrey line from "Batman Forever":
"Don't kill him! If you kill him he won't learn nothin'."
Kid got off lucky. I want to know what video game he was infatuated with.