* AwesomeMusic: Two words: ''[[http://www.youtube.com/watch?v=ZbPlnKZP1fs Roll Tide]]''. [[RecycledTrailerMusic Used again for the trailers for]] ''Film/IndependenceDay''.
** It's HansZimmer. Would anyone expect any less?
* GeniusBonus: During one of their conversations, Hunter and Ramsey get into a debate over whether Lipizzaner horses are bred in Portugal or Spain. Horse breeders would realize that both men are actually wrong, as Lipizzaners are bred in modern day Slovenia.
* MoralEventHorizon: [[spoiler:Captain Ramsey threatening to kill Petty Officer Hilaire to force Weps to open the safe for the firing trigger.]]
* NightmareFuel: The claustrophobia [[spoiler:of being trapped in a sinking sub approaching crush depth and having no idea if the repair crews can save your bacon]]. Also, [[spoiler:a) being the men trapped behind a closed hatch in a flooding compartment or b) being the man who closed it.]]