You're telling me you regularly leave the house with a bullet proof vest on? And you've never even been in a shoot out before? I don't know why I'm arguing with you, you're clearly an extremely irrational person(sorry, but its true) and base a lot of your opinions around fear. And of course it doesn't put them in the actual situations, but it prepares them for them. Do you honestly think you're as prepared for a life & death situation as a police officer is? Do you prepare for them? Have you been taught how to asses situations properly? I really don't think you have. You can act like you know how you would respond, that just tells me you're the kind of person who collapses in a situation like this. Any realist will tell you that they don't know how they are going to react, even if they've been in the situation before. You really don't know much about variables do you? Far too many things can happen that change how a person reacts to a situation. You think just because you are a "fight mode" person from your limited experiences you're going to go into fight mode when you see someone get shot in the head? Have you ever even seen someone with a bullet wound in front of you? Not even a lethal one, just an open wound from a bullet? Now imagine that person laying lifeless on the floor and tell me how you're going to respond.