My Bloody Valentine

In the 1981 Canadian slasher film My Bloody Valentine, twenty years after a tragic accident at Hanniger Mine, a group of young adults plans a Valentine's Day party despite warnings about a local legend of a murderous miner. As the night unfolds, several residents are murdered by a killer in a mining-geared costume, leading to a tense investigation and a shocking revelation: one of the victims is revealed to be Axel Palmer, played by Neil Affleck, who had faked his own death to exact revenge on those he blamed for his traumatic childhood.