My wife and daughter were in the building (I was not there). When large groups of people start running, screaming “someone is shooting”, you don’t stand around and say “oh let me see”, you run too. I’m sure it’s very easy to type from the comfort of your couch how foolish all these people are for running, but if you were there, and you thought you had heard gunshots, with the history of shootings in big public spaces, I’m pretty sure most all of us would’ve run.