Makes sense, no wonder Jackie tried to jump out of the car, yelling, “He is going to shoot all of us”. It could have been a murder/suicide due to Jackie and Jack fooling around on each other and Jack was too drunk to remember who to shoot first.
He was going to shoot Jackie first just to increase the country's anger, but as I said he dropped the gun, it went off and killed him.
I'm just about ready to submit to the Onion.