splat
Explanation
This comic depicts two people sitting in a car whose windshield is almost entirely covered in a massive red splatter -- clearly the remains of an enormous bug. One person stammers "What... do... I..." in shock, while the other, trying to stay practical, asks "When was the last time you filled up on windshield wiper fluid?"
The caption at the bottom reads: "Turns out those Mothman stories were real."
The joke works on multiple levels. First, there is the absurd understatement: confronted with what is clearly a horrifying and extraordinary event -- hitting a creature so large it has completely obscured the windshield with gore -- the passenger responds with a mundane, practical question about windshield wiper fluid, as if this is just a routine mess that could be solved with a few squirts of cleaning solution.
Second, the caption provides the punchline by explaining that the gigantic splatter is the remains of Mothman, the famous cryptid from West Virginia folklore. Mothman is a legendary creature reportedly sighted in Point Pleasant, West Virginia in the 1960s, described as a large humanoid figure with wings and glowing red eyes. The comic takes the premise that Mothman is real and imagines the darkly comic scenario of what would happen if you hit one with your car at highway speed -- essentially the world's worst bug splat.
The humor also plays on the familiar experience of hitting bugs while driving and the annoyance of running out of washer fluid, scaling it up to an absurd extreme. The red color of the splatter (as opposed to the typical yellow-green of insect remains) underscores that this was no ordinary bug.