"But... dinosaurs are all dead! That's what the book said! Was the book lying to me? Why aren't my parents running? Dear god, are they in on it? Is EVERYBODY in on it? Why isn't it eating me!? DEAR GOD, EVERYTHING I KNOW IS A LIE! RUN! RUUUUUN!"
And Zach did not spare a second thought for the fate of his family. I saw this kind of behavior a couple of times in Iraq; when the chips are down, there are plenty of people who'd trample their own mother to get to safety. We all like to think we're not that person, and most of us will thankfully never get the chance to find out.
I guess it's a sign that I'm having a bad day at work when a video of a little kid running from a fake dinosaur makes me think of the father-fighting-his-son-for-bread scene from Night by Eli Weisel.