In his memoir Unsuccessful Thug, comedian Mike Epps recounts how he got his start as an incompetent criminal -- calling the police to save him from a dog whose house he was robbing -- before making it big as an actor and standup. Today, Epps’ brand of self-effacing comedy has landed him big-time roles in films like Next Friday, The Hangover,and How High. Epps performs at Pittsburgh Improv for four shows this weekend.