I worked with a guy a couple years ago who used the planets and nearby stars as a version numbering scheme. For example, the first revision of a file might be "Jupiter" and the second revision might have been called "Mars." (Of course, he didn't use the planets in their natural order)

He also refused to use real version control or even any kind of on network backup and insisted on using a Zip drive to back up all of the code he was working on. Needless to say, we had an intervention that involved hiding the Zip drive, and he quit in disgust shortly after.