We can learn some tactical lessons from this. Have a flashlight of your own. Identify your target. It is safest not to confront a BG if you don't have to... take a defensive position and let him come to you. If you must, do it from a position of strength. Don't just stand there and raise a gun to an armed BG... move and shoot, or use some cover. And in case the BG's you pop happen to be cops, have a plan to effin disappear.
Practice this advice.