True Detective or Deliverance?

It was late in the night when David Smith became separated from his friend, Heath Bullard. They had been running frantically in blind panic in the dark and when they reached a creek, Heath couldn’t go any further – he couldn’t swim, and maybe David didn’t notice, but David plunged headlong into the water, and their separation for a descent into surreal horror began.  

It was August the 8th 1994, and it would be some days before Heath and David would be reunited, but the space in between would see them changed beyond all recognition from their former selves…