Ten to twelve-year-old point a gun to your head at bad breath distance.
The gun as we know is just an object. The bullet that comes out of it is another object; it will not fly any slower or produce less damage just because a little boy pulls the trigger. If it hits you, you will be gravely injured or dead, therefore the use of deadly force to defend oneself should apply.
But Lord! What a burden to carry.
If anything, this video is a grim reminder that we don’t know who is gonna attack us, when is he/she gonna do it or where. Any mental image we have of the perpetrator is just mental prevarication.