Here are some things I got from it:
- He was aware of the threat. Most people are so oblivious to their surroundings, they are attacked before they notice there's even a potential threat.
- He tried to de-escalate the situation by offering to move.
- He didn't bring the gun into play until there was an obvious move, i.e. putting his hand in his pocket.
- He didn't overtly threaten him with the gun, but made it obvious that he had one and was ready to use it.
- He took the proper action at the end. Even though he had apparently resolved the situation, he left. AND, even though he didn't discharge the gun, he called the police to report the situation.
In every situation where a gun is used, there will be debatable points. I'm sure some will see things I haven't, but I'm impressed with this. I wish all self-defense situations went this well. Of course I wish they're never necessary, but if you have to do something, this was a good outcome.