I consider the entire world a disruptive environment. I’m OK with that. As the Talking Heads pointed out, heaven is a place where nothing ever happens. As the touchy-feely T-shirt says (or would, if there was enough room) life turns out best for people who make the best of how things turn out. Which is often a matter of proper training. Which doesn’t include a perfunctory left-right “goon check” after sending lead downrange. (You need to actually look.) Here’s another one: training with a steel target removes uncertainty. The CLANK tells you you’ve hit your target and cues you to move on to the next. Under stress, in the real world, you probably won’t know exactly where your round went and (more to the point) if it did any good. Other than that?