(Via James Lileks on Twitter...)
If you're familiar with The Andy Griffith Show and the original Star Trek TV series, maybe you'll appreciate this "worlds colliding" moment. Apparently, two Star Trek episodes used the "Mayberry" sets when the crew of the Enterprise visited an Earth-like planet. Check out some stills on this site: Mayberry in Star Trek.
My favorite is the one where Kirk and some lady are walking right past Floyd's Barber Shop-- with the name right there on the window. (g) If only they'd gone in and visited a while with the friendly denizens of Mayberry!