I recall a conservative news segment where the "jounalist" and "expert" had discussed that the kids should have rushed the shooter and overwhelmed him. Doesn't matter they were 6-7 they should have stepped up and stopped it all.
Meanwhile, the actual people gained to do that wouldn't, despite overwhelming numbers
I recall going to a time management seminar. The speaker said, "When the average interrupted during a task, even momentarily, the time it takes the person to get back on task is between 20-60 minutes, and can take longer"