Every machine in the coin factory broke down suddenly without explanation. It just doesn't make any cents.
Why this joke works
A Mint That Cannot Make Cents
A coin factory, or mint, literally makes cents and other denominations. “It doesn’t make any sense” means something has no understandable explanation. Replacing “sense” with the identical-sounding plural “cents” turns the unexplained breakdown into a description of stopped production. The setup supports both halves precisely: “without explanation” activates the idiom, while broken mint machinery guarantees that no new coins are being made.
A closer look
A Total Breakdown Produces a Neat Final Line
“Every machine” makes the failure comprehensive, while “suddenly” and “without explanation” turn it into an industrial mystery. The second sentence sounds like frustration with that mystery until its spelling points back to production. “Just” adds resignation, as though the speaker has exhausted every theory. The balanced two-sentence structure moves cleanly from cause unknown to output impossible.
Fact behind the joke
Modern Coin Presses Can Strike Hundreds Each Minute
The U.S. Mint says a circulating coin press can strike about 750 coins per minute using 35 to 100 metric tons of pressure, depending on denomination. Metal blanks are softened, washed, given raised rims, and then stamped between dies. If every machine stopped as the joke imagines, the interrupted process would involve far more than the final striking press.