If you loved Mandy, try The Day of the Beast
A bridge between a film you've already seen and one most people haven't. The Day of the Beast has roughly 3.5× fewer votes than Mandy — it's a deeper cut, not a mainstream recommendation. Here's what they share, and what the second one does that the first one doesn't.
What they share
Theyboth carry the surreal mood tag, and they sit in Action / Horror territory. If that's the register that drew you to Mandy, the second film will land in a comparable space — through a different lens.
What The Day of the Beast is
Madrid, Christmas. A ringing phone. A defrocked priest decodes the Book of Revelation, finding the Antichrist's birth imminent. Teaming with a metalhead record clerk and a charlatan TV psychic, he plots to stop the coming apocalypse. De la Iglesia’s infernal comedy mixes blasphemy and slapstick.

