The city of Houston and the Department of Homeland Security have teamed up to produce this pretty intense public-service video on how to respond in the event that a gunman goes on a rampage at your office, and even though the massacre in Aurora didn’t take place in an office setting, this does seem like well-timed advice. According to the video, the three best options are, in order: run, hide, or fight. Do not just continue working as normal.