Twinsanity

Two couples vacationing together in an R.V. from Texas to Colorado are terrorized after they witness a murder during a Satanic ritual.

Will and his new girlfriend Kira are invited to a dinner with old friends at the house of Will’s ex Eden and her new partner David. Although the evening appears to be relaxed, Will soon gets a creeping suspicion that their charming host David is up to something.

Two middle-aged women move to Hollywood, California after their sons are convicted of a notorious murder and open a dance school for children eager to tap their way to stardom.

Loner Mark Lewis works at a film studio during the day and, at night, takes racy photographs of women. Also he's making a documentary on fear, which involves recording the reactions of victims as he murders them. He befriends Helen, the daughter of the family living in the apartment below his, and he tells her vaguely about the movie he is making.