This one is in the "acquaintance" category, but it happened to my wife in a Bible class of three-year-olds she was not teaching the class, but helping -- we call it "riding herd" or being "muscle." They were talking about idols, and why they're bad (try explaining
that to three-year-olds), and one of them leaned close to my wife and asked in all seriousness: "Do idols bite?"
This one happened to me while I was working at a youth camp during my college years. Junior High (11~13 years old) kids. There's a long lead up to it, but the short version is one of the little girls (11) got taken to the hospital for a cut in her scalp, and they put staples in instead of stitches.
She came up to me that evening and I asked her how she was doing, and she told me she was okay, but that they'd put staples in her scalp. Then she looked up at me (I'm 6'1" and she was about 4'6" so it was a long way up) and her face crumpled to the very brink of tears and she asks, just short of a wail of anguish: "What if they
rust?"
I of course quickly reassured her that the the staples were made of stuff that wouldn't rust, and that it would be okay, and she was fine. The memory is still a touching one, even 15 years later.
Oh, dear. I just realized those "kids" are all probably grown up and married with kids of their own by now ... perhaps I need to sit down for a bit.