The scene of a clean-shaven Greg Nicotero playing a Nazi who is attacked by Hugo Stiglitz is shown in the beginning, revealing both Nicotero's role and the fake head that was created for the scene.
Jaws is referred to repeatedly as one of the movies that made Nicotero want to do fx. Jaws memorabilia is featured prominently, and Nicotero displays one of the original Ben Gardner heads.