5. When Mark is posting on his art final under an alias, he is using the alias Tyler Durden, a main character of Fight Club (1999), another David Fincher film.
6. The real Mark Zuckerberg had never heard of an Appletini before he had seen the film. After he tried one, he liked it so much he made the Appletini Facebook's official drink.
7. David Fincher's favorite line in the film is, "I'm just checking your math on that. Yes, I got the same thing."
8. The only scene Jesse Eisenberg had a problem with was the scene where Mark Zuckerberg films his friends jumping into a swimming pool from a rooftop. Originally Zuckerberg, instead of just filming it, was supposed to join in as well. Eisenberg couldn't imagine Zuckerberg having that kind of fun. By the time it came to film the scene he was relieved the script had been changed so he just observes it instead.
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