It’s the third act of the slasher movie. The two remaining teens think they can dodge the maniacal killer by running into a hazy discotheque. Everyone is wearing white leisure suits with shoulder pads. As the synths and dull thudding drums reach a fever pitch, a chainsaw screams and decapitates the DJ. His head lands at the protagonists’ feet. They aren’t going to make it out of this club alive.