Well, we have had the thread were everyone talks about things that happen every campaign, so here's something you don't see everyday:

Everyone knows that in campaigns, the Danish just sit on Denmark and don't do anything. The strangest thing happened today, though. A rebellion arose on Denmark, beat the Danish, overran their castle and killed their king, destroying the faction.

I have never seen a "starting" province rebel before, especially not in this manner.

What other really weird things have you seen.