Abite. Abscondas. Bellum.

     It looks better in Latin, though Tam points out it needs the imperative:* "Run.  Hide.  Fight."  This useful advice is getting more and more coverage in the wake of the latest outrage, a car-and-knife attack at Ohio State University that was originally reported as a mass shooting by over-eager mass media.

     As chastened as they ever get by this mistake, reporter after reporter has been standing outside of the nearest higher educational institutional building, solemnly telling me what I already knew: when the unexpected strikes, you have three choices: Get away, get out of sight, or put up your dukes.

     None of these well-groomed talking heads have yet managed to point out that you must make a choice: "Freeze where you are" is how you get killed.   Observe, Orient, Decide, Act -- and do so with alacrity.  The order is important: if you can get away, you'll buy time summon help and/or take the subsequent options, if necessary.  At OSU, one student reported that after the cellphone warning, "military people" who were fellow-students in her classroom shut the door, directed the other students to get well away from it, and arrayed themselves to ambush anyone entering.  Unable to flee, they hid and prepared to fight.

     "Be Prepared."  "Semper Paratus."  What'll you do?  Take a little while to think about it now, so you can decide more quickly later if trouble comes your way.
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* No Latin scholar, I get the too-verbose, "Oportet te currere. Tu oportet absconditus. Aut necesse est bellum," which I suspect (to the point of near certainty) makes a hash of the grammar.