Because the organizers of the networking session were feeling playful, the PhD student has a nametag that says "Firstname Skywalker" and under that, "Sith Knight".

Him: Look at my nametag! I can force choke people now!  Do you know only two Skywalkers have ever gone dark?
Me: You know that they nearly put Firstname SexyMonkey on your nametag, right?
Him: Well, then I'd choke them another way.

And then I choked on my laughter.