I was reading about WikipediaFS, couldn't find mention of it on HN, and remembered it was mentioned in this talk, alongside other similar cool things. What are

I was reading about WikipediaFS, couldn't find mention of it on HN, and remembered it was mentioned in this talk, alongside other similar cool things. What are some other ideas using system features for unintended purposes? Using our familiarity with one domain in another, in a surprising way? I guess a lot of computer UI things are real-world metaphors, like windows, files, buttons etc, but these are metaphors between two computer domains, like a folder representing a youtube search, or a text file representing a wikipedia page etc. p.s. Can't put exclamation marks in HN titles? They're removed automatically.