Prom Night III: The Last Kiss (1990)

Prom Night III: The Last Kiss is a 1990 Canadian horror film. It continues the story of the ill-fated prom queen from part 2, Mary Lou Maloney.

Plot
Trapped in hell, murderous prom queen Mary Lou Maloney (Courtney Taylor), who burned to death in 1957, manages to escape her chains by severing them with a nail file. Returning to her place of death, Hamilton High School, Mary Lou kills the school janitor and one of her many former boyfriends Jack Roswell (Terry Doyle) by electrocuting him with a jukebox to the point that his pacemaker bursts from his chest. The day after Jack's death, Principal Weatherall (Roger Dunn) officially opens Hamilton High's recently reconstructed gymnasium, accidentally severing one of his own fingers while cutting the ribbon with a pair of scissors, an act which prompts an unseen force to wreak havoc through the gym with powerful winds.