I'd really like to say it'd be best to just be nice and introduce yourself -citizen to police officer, you'll likely see each other around, and it's generally good to be friendly and maybe even know somebody's name.
But then again, he is a cop, and you don't want to give them anything. This isn't Smallville and everybody knows everybody else and the local cop is your neighbor and your kids go to school together.
I was impressed that the carrier was so careful, not even naming himself unless the situation became "official" and you're required to. I don't think the carrier was being a jerk. Remember that nothing you say to police can help you! Say nothing or as little as possible. Know precisely what you're required to do, don't get chatty.
Fumbling with it when he didn't even know if it was real, or loaded, or how it worked was pretty strange. If you're carrying, would it be better to be voluble about it and let him know precisely and carefully the status and how to handle it? Less words is generally better...
Not handling it yourself, in front of cops is a good thing too!