2011 film written by Andrew Wight (who has sadly passed away recently) and produced by Creator/JamesCameron, among others.
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!!Provides Examples Of:

* ThreeDMovie
* AxCrazy: [[spoiler: Carl, resulting in Frank's death]]
* BlackDudeDiesFirst: Well, sort of. Luko is a New Guinea native, dark-skinned but not African.
* BloodFromTheMouth: George, suffering from the Bends.
* ChekhovsGun: Josh's fang necklace with a built in flashlight.
* DwindlingParty
* DiesWideOpen: Judes drowns like this.
* FakeAmerican: Wales-born Ioan Gruffudd.
* InMediasRes: The first shot you see is Josh floating aimlessley, seemingly dead. [[spoiler: He makes it out though.]]
* IdiotBall: Victoria holds this most of the time, which [[spoiler: kills her when she cuts her own rope to free her entangled hair.]] Justified in that she has no experience in cave diving, which other characters point out constantly.
** She refuses to wear a wetsuit and gets hypothermia as a result. Might cross into somewhat understandable {{Squick}} / HeroicBSOD territory [[spoiler: once it's taken into account that she was ordered to wear the wetsuit off a recently-dead body.]] Still, it does not ''quite'' befit a trained and experienced mountain climber to behave this way (Victoria's said to at least have climbed Everest). [[spoiler: Minding one's long hair (or not keeping it that way)]] is a habit expected from a mountaineer as well.
*** [[spoiler: The hair issue]] is perhaps excusable, as by that point Victoria was suffering from hypothermia and not thinking clearly.
** Considering that they have limited amounts of battery life, they ALL use their headlamps [[spoiler: and later engine oil torches]] ALL the time. Alternating lamps would have allowed them to have light for a lot longer.
* IWillOnlySlowYouDown: [[spoiler: George, suffering from Decompression Sickness, coughing up blood, and unable to continue, crawls off into a side-tunnel and hides, waiting for death]]
* LargeHam: Ioan Gruffudd, so very much.
* MenAreTheExpendableGender: [[spoiler: {{Averted}}. And how. Judes is the first character to die, but her death merely sets the stage for Victoria's shocking demise.]]
* MercyKill: Frank does this to Luko after he falls down a shaft and breaks all the bones in his body. [[spoiler: Later, Josh must do it to his dad after he's been stabbed by sharp rocks.]]
* SurvivalMantra: Frank recites "Kubla Khan" (also less commonly known as "Xanadu") by Creator/SamuelTaylorColeridge. Josh later asks his father to teach him the poem in their mutual HeartwarmingMoment.
* TheHero: Josh, right? Not so fast. [[spoiler: The only life he actually saved was his own. And by neglecting to bring extra oxygen to the cave he was at least partly responsible for Judes' death.]]
* VeryLooselyBasedOnATrueStory: Nobody actually died in the true story, which was experienced ''by the screenwriter himself.''
* WellDoneSonGuy: Josh is really detached from his cave-diving, spelunkering dad.
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