The Dark Knight's Dark Night (Shooting in Aurora)

You want an actual solution? Have f`ucking security at the back entrance, or at least lock it so someone can't waltz in.

All valid points, but especially this one. I'm not going to argue with that, the theatre dropped the ball bigtime by not even noticing a back door propped open. Still, a scenario in which where he dies to a headshot is still better because less people get hurt overall. Even if a person stood up and drew attention by firing on the gunner...that person would probably still die, but that would be a few seconds in which he was focused on a single person instead of groups of people. Still less people would die.