The good folks at TIME have somehow found this amazing footage which shows off a very young Steve Jobs giving a public demo of one of the first Mac computers.  It is pretty surreal to watch, and to see him nailing it at such a young age.

TIME has some more of the backstory:

This presentation, at Apple’s annual shareholder meeting on January 24, is the stuff of tech-history legend. What’s not so well remembered: Jobs did it all twice, in less than a week. Six days after unveiling the Mac at the Flint Center on the De Anza College campus near the company’s headquarters in Cupertino, Calif., he performed his show all over again at the monthly general meeting of the Boston Computer Society. His host, Jonathan Rotenberg, was a 20-year-old student at Brown University who’d co-founded the BCS in 1977 at the age of 13.