"Social Network" star Jesse Eisenberg received some surprise visitors during his "Saturday Night Live" opening monologue. First, SNL star Andy Samberg joined him onstage to one-up Eisenberg's Mark Zuckerberg impression. Then, to everyone's awkward delight, the King of Facebook himself rounded out the trio. It was a hooded sweatshirt extravaganza until Samberg rushed offstage when Eisenberg asked Zuck what he thought of "The Social Network." And, yes, the resemblance among the three was pretty uncanny.