Yes. That is why the dad "guy who is dead" went out there yelling. Edit, they weren't alone, but a few kids in their own yard.
So family A throws mattress in dumpster. Fat Family throws mattress back in their yard. Family A throws it back in dumpters. Fat ass takes a gun out. That is how it started.
You're reading too much into it. Peep this. First, the dad went out because of this: next paragraph They may not have even still been there when the gun was pulled. And, if they were even outside I bet they were way off to the sid and not near the spot the confrontation was taking place.
It doesn't matter. Kids are playing in the back yard and they threw a fucking mattress away. No reason what so ever to "take" a gun out. Dude will do Texas maximum.