Either run (80%) or attack (20%). That’s my guess. Fight or flight. That’s how humans respond.
Ok. I did a little research. Couldn’t find what I was looking for. But I did find that researchers have about five categories of response these days: fight, flight, tend, befriend, and freeze. Women do the tending and befriending. Men do the fighting and fleeing. Not sure who all does the freezing.
What I couldn’t find was the prevalence of responses to threat. If indeed, no one has done research on this (unlikely), it would make a great dissertation. I can’t understand why researchers wouldn’t have studied the frequency of various responses in various types of situations.
So I’m sticking with my guess. Under attack from gunfire, I think most people will run or freeze, but a small, yet significant portion will attack. Obviously factors such as drugs, environment, and other things will affect the decisions that home invaders make.