I'm wondering if this counts. In his defense, it might've been a little rude of the three of us, but still, this guy was out there.
We, my BF, sissie, and I, sat down with one of my acquittance at McDonald's some many moons ago. We're not the best of friends, but we both showed up at the restaurant and it would've been awkward to act like he wasn't there, so we just ate together.
This guy is a self-proclaimed survivor type thinker. He got onto a discussion of if the nearby military base, and asked all of us what would happen if a mutagen escaped the Base and entered town and made us into Zombies.
Yes, I know, this might be an interesting topic to some. However, the way he told it, he sounded dead serious. I mean, not theory, dead frikkin serious. We tried to talk him into saying that the Base doesn't handle bio weapons (they are not classed to), but he said that's what the government wants us to think.
So the guy spends most of the conversation trying to talk us into how to survive a zombie invasion and what if the entire town were infected by whatever the Base has, and he wants evidence that they don't have it.
Maybe we were rude by not playing along, but he caught us so off guard it was... huh. Not normal, by any means!