Something happened at work today that made me think of this thread....
I scanned a couple of documents and was in the process of e-mailing them to my boss (who is from Chicago and a Cubs fan). While this was going on, we were in the middle of a Cardinals v. Cubs smaquefest, which, like most Cardinals v. Cubs smaquefests, ends with the Cubs fan having to switch sports to basketball and bring up the Bulls when the subject of championships arises

). Anyway, when I e-mailed the documents to him, in the subject line I typed "Here are your documents, loser."
Well, my boss doesn't notice this, and simply forwards these documents on to the CLIENT WITH THE SUBJECT LINE INTACT. So our client, who is waiting for the documents in question, gets an e-mail entitled "Here are your documents, loser."
So later, I hear my boss explaining to client that he, in fact, is the loser in question, not the client.

And of course, the error was pointed out to my boss by his boss, our department head.
oops.....
Nothing really came of this - the client thought it was funny. But I think I'll steer clear of the department head for a couple of days.