The Social Network's opening breakup scene took 99 takes to film

The iconic opening scene of The Social Network, where Erica dumps Mark, took a staggering 99 takes to film.

David Fincher wanted Jesse Eisenberg and Rooney Mara running on muscle memory

It was a dense dialogue sequence running eight pages, and it needed to be delivered at a rapid, rhythmic pace. Director David Fincher forced Jesse Eisenberg and Rooney Mara to repeat the scene endlessly so that they would stop acting and repeat it purely on muscle memory, just like the characters.

Eisenberg admitted the process left his brain fried

Eisenberg later admitted that this was truly exhausting and left his brain feeling completely fried. In the end, so many different elements from different takes were used that, when they rewatched the movie, you couldn't tell which take was which.

Would you have guessed that scene took 99 takes?