Andrew Fleming’s Bad Dreams (1988) is a hallucinatory horror-thriller starring Jennifer Rubin as the sole survivor of a 1970s suicide cult who awakens from a coma years later — only to be haunted by the cult’s fiery leader, seemingly returned from the grave. Stylized with dreamlike terror and psychological tension, it’s a potent mix of slasher atmosphere and trauma-driven supernatural horror, often seen as a sister film to A Nightmare on Elm Street 3.

88 Films

1980s US horror starring Jennifer Rubin, Bruce Abbott and Richard Lynch. After 13 years in a coma, Cynthia Weston (Rubin) wakes up to find she is the sole survivor of a mass suicide by the Unity Fields cult, ordered by its leader Franklin Harris (Lynch). Plagued by childhood memories of the cult and visions of its leader, Cynthia seeks help in an experimental therapy group led by Dr Alex Karmen (Abbott). However, when several members of the group are murdered, Cynthia fears that Harris is stalking her from beyond

Från IMDB:
Lone survivor Cynthia Weston of the Unity Fields cult's mass suicide wakes from a thirteen-year coma in a psychiatric ward, where other patients suddenly start dying under mysterious and gruesome circumstances.