They look like they were trying to play Nerf tag with shooting at each other there. We did this as kids. But we actually were able to hit each other with the darts. Unlike these two who would have only hit each other if they had the shoot out in the hall closet.
Also, puzzling the man didn't want guns in his house, but he had one inside himself.
Father - get that gun out of my house
Son - No
Father - I won't tolerate guns in my home
Son - you can't make me
Father - be right back
Son - where you going?
Father - to get my gun