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.

YOU AUGHTA KNOW:
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.