The writers thought no-one would notice if they mixed and matched a few different films together.
I highly recommend this film for a skip, or an example of "what not to do" for film students.
A
Abit of Let's Kill Ward's Wife, opening credits from True Blood, then into American Werewolf in London, set in Shrooms, with Cabin in the Woods as a ghost story. Throw in a handful of whatever monsters they could borrow costumes for, and end with a cross between...spoilers sweetie, and a little Dragonslayer, or Krull. NOT a good combination, but a fun game of Spot the Plagiarism.
I'll clear up some of the nonsense claims made by other reviewers. Everyone hates Americans, not just here but the whole world. Because they do things like make snide remarks about driving on the wrong side of the road. We do have isolated cabins in the woods, they're just expensive holiday rentals, not the American log hunting cabins like the one in the film (because we have farming to get our food instead of chasing it round the woods like Neanderthals). Pubs have no reason to particularly welcoming to Americans because, as mentioned above, everyone hates them.....and they are the lightest of light-weights so there's no point welcoming people who will manage a half a shandy each and annoy the other customers. And there are lots of small town and village pubs with only a handful of regulars who are a little suspicious of stangers. Also, the characters in the film weren't customers, they walked in and asked for a "bathroom", no landlady would take kindly to that. The cider was over the line though.
This absolute load of tosh appears to be written and, embarrassing, performed by Brits, since I recognise Alex as "Wesley Presley, from that London" from Two Pints of Lager and a Packet of Crisps and the director and co-writer Bob Pipe appears to be english. But it's very clear, from a couple of very telling comments like "the further you get from London, the weirder these pricks are" that the writers are also from that London. It takes a very specific point of view to label the Cornish as a backward cult of lunatics in this century. At least I'm pretty sure that's where they're supposed to be, it seemed Cornish was the accent they were aiming for, the Jolly Hangman is a real pub in Cornwall and they are somewhere south of London.
It is also abundantly clear that this film was written by two separate writers, who may possibly have discussed the character names but that's as far as the collaboration went. They were each writing their own film then just crammed it all together and hoped for the best. The different ideas clash constantly, sometimes it's a supernatural thriller, sometimes a low budget slasher, but always a poor attempt at imitating better films.