Zombie Cult Massacre (1998)

Plot

Marvin and Sally's trip to Grandma's takes a nightmarish turn when they encounter a living corpse, drawing them into a bizarre cult's world. Under the influence of mind-altering drugs, Marvin undergoes a chilling transformation into a fervent leader, determined to guide the Zombie Cult in a violent showdown against both the undead and a menacing biker gang. What follows is a harrowing day filled with chaos and carnage as the bizarre events spiral towards a cataclysmic finale, leaving a trail of suffering in their wake.