Sounds like a good movie plot. Mr. Citizen, who carries, minding his own business..someone comes into his restaurant (or school, theater, bus station, etc.) and for no apparent reason, starts shooting people in what looks like a mass shooting. Mr. Armed Citizen decides to escape by a back door with his wife and child. This half of the movie deals with the consequences of that move...what happens in the aftermath of the killings. Plus, reporters find out that Mr. Armed Citizen had a gun and might have made a difference...Next thing you know, the whole scene is repeating itself, (through movie magic) only this time, the armed citizen responds by shooting and killing the criminal, then this next half of the movie deals with the consequences of THAT move...complete with reporters finding out that Mr. Armed Citizen had talked about this whole thing on a internet chat room, there are charges of being a vigilanty, etc. I'd watch it.