[onemiddleamerican]

I’m sitting here imagining maybe a third of the theater-goers carrying (in defiance of the theater’s rules)... little James comes in the door, raises his firearm/s, and 75 armed movie-goers pull out their pistols and blow him away.

I like this ending better than what happened. And I think I would be OK with being banned for life from that theater, too.

[Sir Napsalot]

You forgot the couple smoke grenades the perp threw first, and his gas mask.

Not that your scenario won't happen, but it was not clear in the commotion, those with CCW could have a lot of difficulties identify the real perp.