The whole thing started with a comedy routine of Andy Samberg impersonating Mark Zuckerberg:
Key joke: "Take a crazy big number 2, don't share it with your friends....that's for Twitter."
Pretty sure he was reading a teleprompter.
Then Zuckerberg came out and was like "What are you doing? I'm Mark Zuckerberg. You're Andy Samberg from SNL."
Pretty much a rehash of when Zuck was on SNL.
It wasn't very funny.