The 12 guage was the worst.
I was in a large gun shop basically just shooting the breeze when a guy who gave me the impression of being a little strange, wanted to look at a military sword. He took it and played with it a little then looked at me and sort of jokingly drew it back as if he were going to attack. I was 99% sure he was not serious but it scared me. I told in a firm and angry voice to put it down. Fortunately he did so.
For some reason, perhaps deep in the psyche, the sword bothered me far worse than a pistol. Of course the guy holding it made some of the difference.