Beneath (2014) 💯

As their grip on reality slips, the "monsters" they fear become indistinguishable from one another. Friendships dissolve into violence as the miners turn on each other, driven by a primal need for survival and the suffocating weight of the mountain above.

Deep within the earth—600 feet below the surface—disaster strikes. A drilling mishap causes a catastrophic structural failure, leading to a massive cave-in. The collapse kills several workers instantly and leaves the survivors, including George and Sam, trapped in a pitch-black tomb of rubble and dust. Beneath (2014)

Contrast this film with the (which features a giant fish). Let me know how you'd like to expand this! Review: Beneath (2014) - Warped Perspective As their grip on reality slips, the "monsters"