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.
YMMV: Apollo 13
Crosses the Line Twice: Potentially running out of oxygen and suffering from asphyxiation from too much carbon dioxide? Rather terrifying prospect. Discovering that the filters for the command module won't work in the lunar excursion module? Kind of funny, but also rather worrying. Krantz's response? Hilarious.
Krantz: What about the scrubbers on the command module?
Newer Than They Think: The tradition of astronauts saying their goodbyes to friends and loved ones at the launchpad the night before liftoff actually started with the space shuttle era.
The prologue, showing the doomed crew of Apollo 1 banging on the hatch window, attempting to get out of the burning capsule. Then the glove goes back into the fire...
Marilyn's nightmare before the actual mission, which ended with Jim getting knocked into space.
Visual Effects of Awesome: They even managed to fool the NASA guys who worked on that launch. NASA's public relations department, represented by Buzz freakin' Aldrin, asked for permission to use clips from the movie.
There's also Makeup, Costume, and Cast Selection Effects of Awesome: Ed Harris playing Gene Kranz looks literally exactly like him, or at least exactly like him circa 1970; put photos of the two side-by-side and you would not be able to tell the difference. Also, Kranz's wife made him a vest to wear for each mission (he's seen removing it from the box before launch); they simply borrowed the original and had Harris wear it.
Kevin Bacon also comes close looking like Jack Swigert.