(I remember an instance of a player being proactive and pulling something in the world, and the other GM deciding to take the opportunity to introduce a major character early)
@InbarRose Mr Bearington opens the door in a very neighbourly manner and asks you how his day is. And attempts to pass as a person doing it. (Acutally, I'm going to bump that down to Be People 2.)
I use my sword to attack the dangerous scary bear that I fear has taken control of my friend bearington (not realizing the truth, nor wondering what my sword is doing in his house)
You're knocked to your feet! Sir Bearington stands up, shredding the robe on the way up, and asks you what the deuce you're doing attacking him in his house!
Oh, I am so sorry mr bearington. I must have hit my head, for a moment I thought you were a real bear. I am dreadfully sorry. Oh - btw - what are you doing with my sword?
@InbarRose You must have, it was quite frightening! And I was, uh... I found it! Outside your place, yes. I was waiting until morning to return it to you, of course.