“Appendage” (** out of four) was an unpleasant horror psychodrama about a young fashion designer (Hadley Robinson) whose life starts to spiral out of control as her dark inner thoughts begin to manifest into something external and gruesome that won’t stop growing until it takes over (and tries to end) her life. Robinson (who resembles a young Claire Danes) is good in the lead but is overcome by pretentious and cumbersome material. Film’s title is appropriate since it’s made up of “appendages” from other (better) films.