AP Photo/ Rick Bowmer A shooting at a gun store isn’t a common thing. After all, people who work at gun stores tend to both be armed and to brook absolutely zero nonsense within the store. Oh, they may joke around, but that’s different than someone screwing around in a way they shouldn’t. And yet, despite the rarity of such an event, one happened just this past weekend. It was terrible, but it could have been worse. As expected, people who worked in the store returned fire and put an end to the threat before things could get out of hand.