This is a good, old-fashioned monster movie, despite the CGI monster. It begins with some shady carnies purchasing a mysterious creature from a seller--and one of the guys is blinded by its claw. Then we go to the town where they are displaying the creature, where Atlas (Lou Diamond Phillips) is the sheriff. He sees the creature in its cage and is alarmed. Then, it escapes and begins killing the locals. It's revealed that this bat-like creature is really the Jersey Devil. And it's almost impossible to kill.
CARNY is a well-produced creature on the loose flick and perhaps the best movie that features the Jersey Devil...