I have a formed the habit when going into a restaurant, bar or other place of business of thinking how I would react if a shooter came in and started firing. I visualize how it would play out and try to plan how I would react to the event. I position my back to a wall and attempt to keep an eye on the door and bar area. I have never been paranoid but I try to give myself every advantage that I can. After 50 it become harder to run and dive over the bar to protect ones self so I try to stay focused on a response that I stand a chance of pulling off. No one really has a clue how they would react if panic and fear kicks in but I do think that the more you play out scenarios in your head the greater your chance for survival. Do you do the same??