Never turn your back on Mark Zuckerberg, or he'll plunge a knife deeply into it. (And probably twist it a bit as well.) Yes, it's true. According to "The Social Network," he agreed to work with the Winklevoss twins at Harvard on a similar social media project, then ran off and founded Facebook instead. And while he initially worked well with friend and partner Eduardo Saverin, once Eduardo disagreed with some of Zuck's moves, Zuck cut him out of the business to fly solo.
That's how the movie portrays things, anyway. Plenty of others in the know disagree with not only the versions of these events, but Zuckerberg's personality. David Kirkpatrick, author of "The Facebook Effect," says Zuckerberg is definitely not a mean, cruel person, and he should know, as he spent a fair amount of time with both Zuckerberg and company employees while he researched his book. And Karel Baloun, a guy who actually worked at Facebook for a year -- and very closely with Zuckerberg -- says Zuckerberg would definitely never deliberately betray a friend [source: Rohrer].