The title comes from Volume 6 of the Collected Editions of the comic book series. In said volume, Rick, Glenn, and Michonne, having been captured by the Governor upon their first meeting in Volume 5, escape from Woodbury and make it back to the prison.
When Merle is sitting in the car, drinking and blasting music in order to attract walkers, a zombie emerges from a building that's an obvious nod to the bald zombie at the airstrip from George A Romero's Dawn of the Dead. It's wearing the same clothes, has a completely bald head, and also has the exact same injuries as in the movie.