As a young geek, I whiled away many hours playing interactive fiction text games like Adventure (Colossal Cave), Zork, and Planetfall.
So I was quickly enchanted with this video of Jonathan Guberman and Jim Munroe's Automatypewriter. Guberman has essentially converted an old Smith-Corona into a fanciful teletype terminal for interactive fiction.
Watching the type type "by itself" reminds me of a scene from the Star Trek episode "Assignment: Earth", where Roberta Lincoln -- played by a young Terry Garr -- encounters a voice-operated typewriter in the office of time-traveling secret agent Gary Seven. Anyway, it's cool.