Subspecies [Mara Turns]

Scene from the 1991 film, Subspecies. Radu manages to capture Michelle and throws her into the dungon where her fellow student and friend, Mara, was also put. Michelle manages to free herself from her shackles and likewise frees Mara. However as they stop to rest in their escape, Mara reveals a horrible secret.

Example of:
Face-Revealing Turn