the social network - Which class is Mark sitting in when he falls asleep?

He falls asleep in a business meeting with a venture capitalist. IIRC, it was the first meeting that Eduardo set up, and it's set up in a flashback where he says something like, "He came, but I wish he stayed home."

He walks out of a class after being handed a note from a girl that said, "u dick". It's on his way out of that classroom, after being ridiculed by the professor for "giving up", that he rattles off the correct answer.

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