I've got another funny Michigan "safety check."
My dad took in an old S&W revolver that he'd found in pristine condition, to be "checked." The lady at the counter looked it over, and looked it over, and looked it over some more. She then called back into the office for a uniformed officer's assistance (never did get it clear if she was a uniform or not). As the other officer was coming over, she told dad that he wouldn't be able to register it, as the serial number had been removed. The unspoken word being "confiscated."
The frustrating part is that dad couldn't yell at the fool - he'd lost his voice box to cancer years before. And it took him several minutes of scribbling notes to make sure they knew to check under the grips on the butt of the handle for the number.
All turned out well, after he unscrewed the grips.