Neil Marshall's 2005 horror movie "The Descent" has a brutal ending , delivering a masterfully executed rope-a-dope gut punch for our heroine Sarah (Shauna Macdonald).

Let's recap: Sarah loses her daughter Jessica (Molly Kayll) and her husband Paul (Oliver Milburn) in a car crash. After a year of grieving , she and five friends, all extreme sport enthusiasts, go on a spelunking trip in Appalachia. They wind up in an uncharted cave system and are hunted by bat-faced troglodytes. Most of the girls are picked off, but Sarah and Juno (Natalie Mendoza) descend into warriors, as savage as the cave dwellers hunting them.

Sarah leaves Juno behind after learning that she (accidentally) killed their friend Beth (Alex Reid). Adding insult to injury, Juno was sleeping with Paul before his death.

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