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.
Nightmare Fuel: The scenes with Parker getting sucked back in time are downright scary. And after the destroyer returns "safely" to 1943, there's some rather horrifying visual imagery guaranteed to disturb anyone who's not expecting it. Crewmen fatally fused to the metal decking... shudder. These scenes are based on the actual "story", even.