These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
Moral Event Horizon: Captain Ramsey threatening to kill Petty Officer Hilaire to force Weaps to open the safe for the firing trigger.
Nightmare Fuel: The claustrophobia of being trapped in a sinking sub approaching crush depth and having no idea if the repair crews can save your bacon. Also, a) being the men trapped behind a closed hatch in a flooding compartment or b) being the man who closed it.