I got to see a gun at Golden Arches in high school over a larger sized drink... not even for free food, just a larger sized drink.
Some guy bought and paid for a medium sized chicken nugget meal, then when he got to the second window (where I was) after already paying, I go to hand him the drink and he says, "Nah, I want a supasize."
Now, I hated Golden Arches and gave free shit away constantly, but when you tell me to give you something instead of letting me decide to do it on my own, I get pissed. It's just rude. so I'm all "well, no, you paid for a medium, here you go."
So then he says, "Nah, I don't think you understand. I said I want a goddamn supasize!" and pulls a pistol out from his waistband.
It wasn't the first gun pulled on me, and he wasn't even pointing the barrel at me, so I wasn't freaking out, just wondering WTF was going on.
I just looked at him, laughed, then walked away. I told a manager, that I didn't like, that the customer had a gun and was demanding a bigger drink. She was all negative parts of the human psyche all rolled into a little ball of soul-crushing despair, and she seemed to think I was crying wolf so she goes up to the window.
She sees the gun, screams and hits the floor. The gun is STILL not actually aimed at anybody, and no I don't know why he just sat there with the gun out, letting everyone get a good look at his face.
Then the guy drives off, apparently realizing that nobody is gonna reach out the window with the drink he's demanding, and the cops get called. He had taken the tags off his car (or just didn't have any) so we had no idea who he was.
So there you go... a guy pulled a gun on me for a few extra ounces of soda AFTER PAYING for other food. Wtf? Might as well just get a free chicken nugget meal if it's going to be that kind of party. And of all the people he had to encounter, he had to pull a gun on the one guy who's been on the actual business end of a gun before and just wasn't afraid of them anymore.