Great premise of a mother and young son trapped in a zoo with a shooter, but not as exciting as I expected it to be. The close mother-son relationship is endearing, but too much time was spent on the mother's thoughts and reflections of their history while they are hiding and waiting. Not much edge-of-your-seat action. Also disappointed that the ending did not give full closure. A few things were left up in the air. Not bad, but not great.