House II: The Second Story (1987)
Michael stretches the definitions of both "Western" and "Horror" when he makes Pax and guest Shawn Robare watch House II: The Second Story. Though it does have undead cowboys. The movie is the sequel to 1985's House and stars Arye Gross, Jonathan Stark, Royal Dano, John Ratzenberger, Bill Maher, and Lar Park-Lincoln.