‘The Descent’ (2005)

A group of female spelunkers descent (see the title!) into a spooky cave in the British countryside and encounter a group of underground monsters. Quite frankly, "The Descent," from genre master Neil Marshall, is one of the more brain-scrambling movies of the last 15 years even without the monsters. He does a brilliant job of dramatizing the physical and psychological terror of being trapped in an impossibly tight space deep under ground that it is almost hard to watch. But when the blood-thirsty creepers show up, well, game over.