How does Pip come into contact with Wopsle in chapter 31 and what has changed?

Herbert and Pip go to see Wopsle in Hamlet, which turns out to be a horrible piece of theater, but a very humorous evening nonetheless because of the crowd's wisecracks. They invite Wopsle home for dinner and listen to him rant about his performance. Dickens presents a light hearted critique of overacted theater in this chapter. Wopsle's Hamlet is laugh-out-loud comedy. Dickens was an actor and a producer of theatrical productions himself, and there is no doubt he was probably targeting certain actors that he knew personally in this parody.