This UK horror/thriller was released in 2005 on the international market but did not open in the US until Aug 2006. It was a moderate financial success and garnered Empire and Independent film awards for Writer/ Director Neil Marshall. In opening weekend in the US it pulled in a respectable 8.9 million dollars ( more than the film cost to make.).
This is essentially a zombie movie in the confines of an unexplored cave system. The main characters are 6 extreme sport action junkie girlfriends who travel to the Appalachians to spend a weekend spelunking. After a hospital scene during the prologue, there are no male characters for the rest of the film. The set up is decently handled and Marshall does an excellent job of creating a sense of claustrophobic discomfort in the audience,which has them off balance even before the first creature is introduced. Unfortunately, the entree of the first beast also signals a change in the tone from smart and tense to typical horror/ shock film. The girls spend the rest fo the film shriekimg at creatures as they pop out of crevices or holding deathly still as they creep by only inches away. They also spend a good deal of time bathed in blood. Their own, each others, blood coagulated into random pools and lakes throughout the cavern. Marshall gamely throws in a few twists and some heavy handed metaphors but the film winds up being rather average.

tagline: Afraid of the dark? You will be.