In school, I occasionally played SimCity 3.
I remember one of the messages you sometimes got alerting you to the current situation was, "Brownouts, build another power plant!".
Only years later did I learn that a brownout is a kind of power outage
where the voltage level is below the normal minimum level specified for the system. I always used to think it was a made-up insult: "Yo, stupid, build another power plant already!".
(Though now that I think about it, if they had used a semicolon—as I think they should have anyway—, I would probably not have taken the word for a vocative.)