Released: 2005
Director: Neil Marshall
Starring: Shauna Macdonald, Natalie Mendoza, Alex Reid, Saskia Mulder, Nora-Jane Noone

In this slow-building horror sleeper, a group of women squeeze into an unexplored cave system on a bonding trip and find themselves trapped underground with bloodthirsty mole creatures. We're pretty sure it's a metaphor for girl-on-girl STD transmission during menstruation but we could be wrong.

Even though the "crawlers" are seen only briefly, Marshall wanted them to have fully developed personalities, so he used professional actors to portray them instead of stuntmen or dancers.