Silence can be inspiring. It can also be incredibly awkward, as Mark Zuckerberg learned in his 2005 return to Harvard, where almost no one showed up to his lecture. Luckily, Zuck harnessed the awkwardness to make some fascinating points. *WATCH NEXT: Elon Musk, before Paypal (Pre-2000)*



It’s also an unpolished, uncensored version of Zuck that we just don’t see anymore.

Zuckerberg’s lecture was a part of Harvard’s introduction to computer science course, CS 50. At the time, very few students took the course. This academic year, just nine years later, CS 50 became the most popular Harvard course, with over 1,000 students. In addition, hundreds of thousand of others participate online via free video lectures.