...my guess is he didn’t shoot the man out of revenge for taking his popcorn.
The shooter, according to the eyewitnesses, stated in the heat of the moment why he shot the thrower. He said: "I'll teach you to throw popcorn at me." If that's not retaliatory, I don't know what is. There's really no need to guess given a statement like that.
...what I see is a 72year old man sitting down assaulted by a much younger assailant in a position he could not retreat from.
He didn't need to retreat. The thrower had already stepped back before the shooter fired.
As I said in an earlier post, had he fired as the thrower was approaching, that might have been different and he might have had a chance to claim that he was honestly afraid he was about to be violently attacked. That wouldn't have been a slam-dunk defense since the thrower was unarmed but disparity of force may have come into play in those circumstances. Then the problem would have been proving that it was reasonable to fear for his life because the thrower was coming at him. Not a great chance but at least a possibility.
Since he waited until after the popcorn had been thrown and the thrower had stepped back away from him, it's a different story. There's not a good way to paint that as a legitimate self-defense scenario.
I’m curious what you guys would have done differently, in the moment he grabbed your popcorn from your hands and threw it in your face?
I'd like to think I wouldn't have let it escalate to that point. This went on quite awhile from the first time the shooter complained about the texting--giving the shooter time to leave the theater and then come back and resume his complaints. A lot of time to realize that the exchange wasn't going to be productive and let it drop.
What would a reasonable man have done?
[sarcasm]Kill him, what else![/sarcasm]
Seriously, what would any reasonable person do if someone throws popcorn at them? It's irritating, even infuriating, but it certainly doesn't justify deadly force. A reasonable person lets it drop. In fact, a reasonable person probably wouldn't continue the exchange to the point that it actually descended to that level.
This is one thing that's important to consider when we deal with people--our choices have consequences and part of the consequences is that they affect future choices. New choices can be created that weren't there before. Choices can be changed. Choices that existed may be eliminated.
For example, choosing to confront a person for annoying behavior eliminates the choice to simply move unobtrusively away from the source of annoyance without the possibility of a scene. Am I saying that it's always a bad choice to confront someone? Certainly not, but I am saying that one should keep in mind that such exchanges are not always productive and have the potential to turn sour.
There was a story in the news recently where a father's choice to engage in road-raging with another idiot who had even less self-restraint ended up costing his daughter her life and putting his young son in the position to watch his sister die in front of him. It wasn't the father's fault, it was the fault of the murderer who fired into their vehicle, but the father's choices certainly made a difference in the outcome.
In a situation where a decision is made to confront, one needs to also consider the possibility that after the confrontation is begun, the circumstances may dictate that the best option is to back down and try to let it drop if the other party isn't behaving like an adult. A person who knows himself/herself well enough to realize it will be very difficult to back down should think extra hard about beginning a confrontation in the first place.
The other alternative is just doing whatever you feel like without putting any thought into it right up until the point where there's a life or death decision to be made and hoping you're still rational enough at that point to make the right decision.