Now you got me thinking, what is the best way to kill a class of school children from the inside? You need to be systematic. Bring a couple of large knives in to school and your first step is to barricade the door while keeping the class in check. And you need to choose a classroom that’s not on the ground floor so they can’t all escape out the windows without sustaining serious injury.

Now the hard part. Taking them out one by one while keeping them subdued enough not to rush you. The adult teacher should probably be first. Maybe one knife in each hand as you lure/force one away from the wall one at a time.

Maybe you can make them believe you’re Thanos and must eliminate half of them, that’s half the job done while the other half think they have a chance to live. When you’re done you can finally rest, and watch the sun rise on a grateful Universe. Do you wait for the police to bust in and commit suicide by cop? Do you give yourself up? Or do you dive out of the window. The hardest choices require the strongest wills.