the-bat-limit
Explanation
The Joke
The comic shows Batman lying in bed (or on a medical table), clearly in pain, shouting: "OW! AH! OKAY! NOT EVERYTHING NEEDS TO BE BAT SHAPED!" The caption below reads: "Late in life, Batman decides he doesn't want to be bat-theterized."
The joke operates on two levels. First, there is the visual gag of Batman reaching his breaking point with the bat-themed branding of everything in his life. In the comics and films, Batman famously makes everything bat-shaped: the Batarang, Batmobile, Batcave, Bat-Signal, etc. The comic imagines this extending to medical equipment or some other painful context where the bat shape is actively harmful. Second, the caption delivers a pun: "bat-theterized" is a play on "catheterized" (having a catheter inserted), with "bat" replacing "ca-" to suggest Batman is having a bat-shaped catheter used on him.
The Humor
The punchline is a cringe-inducing pun that works precisely because the audience can vividly imagine why a bat-shaped catheter would be agonizing. The humor combines the absurdist observation about Batman's compulsive bat-branding with visceral physical comedy. The title "The Bat Limit" perfectly encapsulates the joke: there is, it turns out, a limit to how many things should be bat-shaped, and Batman has just discovered it in the most painful way possible.