A surprising cult hit, which even more surprisingly was from a pre-"Lord of the Rings" director Peter Jackson (yes, him). The film takes place in a small coastal town in Jackson's native New Zealand, where a specialist government unit, the Astro Investigation and Defence Service (giving them the somewhat unfortunate acronym of AIDS) have been called in to investigate the disappearance of all the towns folk, following a UFO sighting.
They soon discover the town has been taken over by aliens, who have killed the population, and turned them into their favourite brand of fast food. What starts as a routine investigation, ends up in a massive gun fight as they discover the alien's space ship, cunningly disguised as a nearby building, and a massive battle erupts.
The amount of blood and gore in this film is quite phenomenal, even by Clive Barkers, or George Romero's standards. But, it's presented in such a way that it just makes you laugh hysterically. There's vomit eating, brain eating, cannibalism, exploding heads, EXPLODING SHEEP!!!!!!! Terrific stuff.
Filmed on a shoestring budget, this one went down a storm at the Cannes film festival, which took the cast and crew by complete surprise as it started life as a pet project and was never originally intended for general release. Whilst the acting and special effects aren't quite on the same par with mainstream Hollywood blockbusters, this film is an absolute scream and if you haven't seen it already, do so at once. I cannot recommend it enough. Prepare to be grossed out like never before (Lord of the Rings fans are bound to be shocked).