Not long ago, horror movies were fairly predictable: Your unstoppable psycho, your half-naked women, several buckets of blood and an ending that promised a sequel. But today? That’s so 20th century.

In the short film “Red Tops,” a couple is getting friendly in Audubon Park while their radio broadcasts WBYU 96 FM. Though the DJ promises to play the hits, he has a strange sign-off line: “Dance like ...