I once worked on some software that would decipher logs and error codes and do some simple OS tests for the field service people.
One of the tests did not work at a specific level of the machine's microcode.
I did NOT put in the message, "Upgrade microcode and press <RETURN>"... but as a joke, my weekly progress report to my manager did say that I'd done that.
Five minutes later he came almost running into my office...