Sewer Monster Halloween Mask - Sculpted by Justin Mabry Deep within the murkiest sewer, of the darkest city, you will find the home of the Sewer Monster. A merciless killing machine, the Sewer Monster surfaces at night to satisfy its craving for human flesh. Believed to be the side effect of an experiment gone horribly wrong, only one person has ever survived its vicious attack. That person is our own Justin Mabry. After the encounter with the Sewer Monster, Justin was kind enough to give us this horrifically Scary Halloween Mask.