He was a zombie. Part of the living dead. Then, how was he here, eating a sandwich? Why was he in society in the first place? And most importantly, what comes next?
New York is a crazy, sadistic, slightly amusing place. So, naturally, it would be filled with crazy, sadistic, slightly amusing residents. But those don't just include the living. It includes the dead as well. Welcome to New York City, head location of the brain and flesh dealings of the zombie gang.