Slaughterhouse Rock

Alex Gardner (Nicholas Celozzi), a college student suffers from reoccurring nightmares in which he experiences the deaths of the victims of a vicious killer who lived on Alcatraz, before it became a prison. When the nightmares begin manifesting in reality, and his friends see him hovering over his bed, his teacher (Donna Denton), an occultist, tells him to go to the island to face down the ghost of the killer. The friends become stranded on the island, and Alex's brother Richard (Tom Reilly (actor)) becomes possessed, killing some friends and raping one of the girls. Alex is aided in his quest by the ghost of Sammy Mitchell (Toni Basil), a singer for the band Bodybag. Sammy teaches Alex how to levitate and escape his body, and is also the subject of a dance routine, intercut into the film. The friends lure the ghost of the killer, and Alex's brother into the prison chapel, and blow it up, releasing the curse.