I had an incredible coincidence happen to me today.
I attended a community trans support group in my city. About halfway through, one of the girls whom I've never met before started talking about her work, and name-dropped her employer - and I realized "OMG, that's the same company I work for". She mentioned she works in such-and-such IT department, and I thought, "hey, I work in IT too..."
My brain had to work extra hard at this point, and I finally recognized her. I had been working next to this person (I mean several cubicles away) for two years. We have moved offices since then, but still, once upon a time we were office colleagues. The funny thing is that it took me so long to recognize her. It then dawned on me that she also failed to recognize me! So we sat across the room in this meeting for hours never realizing we knew each other. I was pretty speechless at that point, but I managed to identify myself. Everyone at the meeting had a good laugh at the situation. The odds are wild - Calgary has over a million people - and yet there we were, both trans, same job.
We had a chat afterwards, and she recounted how she revealed the news to management and the HR department. I'm not out at work, but she totally paved the way! If / when I ever come out, I can make all sorts of jokes ("there's something in the water here!"). Sigh...
What a crazy, small world.
