If you come up to me and ask to see a pistol in the case, you're going to instantly be "swept" by virtue of the fact that all handguns are pointed outwards in the case, and if you're standing in front of it, it's pointed at you. Same thing goes for when putting it away.
Guess what: when you walk into a shop, muzzles are pointed in your direction. Even if no one's touching them, you're still being "swept".
Unpermissable behavior is picking up a weapon and aiming it at someone. Having the muzzle of a cleared weapon sweep you for a split second during the process of handing it over, isn't the same thing.