On this episode of "Actually Me," Mark Wahlberg goes undercover on the Internet - creating profiles on the most popular social networks and communities - and responds to real questions from Twitter, Instagram, Reddit, Quora, Wikipedia, Facebook, and more. Can Mark really do one-arm pull-ups? Was that a prosthetic in Boogie Nights? Did he really sing in Rock Star? Is he friends with Eminem? Can he really shoot a rifle?