Return of the Living Dead 5: Rave to the Grave

In this sequel to 1985's Return of the Living Dead, a bunch of horny teens discover that their new designer drug is actually a chemical that turns humans into flesh-eating zombies. Unfortunately, they don't make this discovery until they're in the middle of an enormous outdoor dance party, where the wild costumes and chemically induced shenanigans make it difficult to tell who's a zombie and who's simply having a good time. Although it shares plot points, characters, actors, and crew with Return of the Living Dead 4: Necropolis, Return of the Living Dead 5: Rave to the Grave features only a cameo from Peter Coyote, the sole bold-faced name from the previous film. Both movies were co-written by William Butler, who previously acted in 1990's Night of the Living Dead remake, among other horror films.