How about this answer: no hablo ingles...
Or this: I only answer to Allah you filthy infidel, and I am here to do his will! (Well maybe not this one)
Or this: it's an ostomy bag, want to see it?
I've been carrying since shortly after the state of Nebraska decided to obey the law (more or less) and allow it, and no one has ever mentioned anything to me about it.
When I go to a gym I leave my gun and extra ammo locked in my car but leave the holster on my belt, and after years of doing that no one has ever commented on the empty holster. I always try to keep a low profile just as a habit, so maybe no one has ever noticed it. But if they did it wouldn't be a big deal since it isn't illegal. I have never been to (or even seen) a gym with a no guns sign (and if I did I would not go to that gym), but it just makes more sense to me to leave my gun in the car instead of locking it in the locker. I remember a uniformed police officer at one gym I used to go to always locked his gun in his locker, and when he did I remembered once when I locked a key to my lock in the locker I went to the desk and told them about it and they came back with a big set of bolt cutters and cut the lock off for me, just assuming I was telling them the truth. So I prefer to leave my gun locked in my car.