The Moon
Explanation
The Joke
Someone argues that the moon landing was faked. An actual astronaut or NASA engineer is present and, instead of arguing about evidence, simply breaks down crying at the idea that their life's greatest achievement is dismissed by someone who watched a YouTube video.
The Humor
The comic doesn't engage with moon-landing conspiracy arguments on their merits — instead, it focuses on the human cost of conspiracy thinking. Thousands of engineers, scientists, and astronauts devoted their careers to the Apollo program. The emotional weight of having that work dismissed by an amateur is played for both comedy and pathos.
The choice to show grief rather than anger is what makes it effective. The expert doesn't argue; they're just sad. This conveys that some beliefs are so divorced from reality that engaging with them rationally is pointless — the appropriate response is mourning.