Well, many funny things happened at Mysticon but the best, for me personally, was when I discovered that I had a story published when I didn’t know about it!
Davey Beauchamp had asked me to write a story for a Writers for Relief volume to help the survivors of the Japanese earthquake. I promptly wrote him The One Tree of Luna but the anthology never appeared (this because of forces out of his control). Finally, I told him that I was taking the story back as I wanted to get it into print somewhere which became the collection now known as The One Tree of Luna (And Other Stories).
Later he contacted me about a Writers for Relief for the Oklahoma disaster and I allowed as how I had no new story but he could use Luna if he wished. Hearing nothing more, I got the impression that this idea, too, had died for reasons beyond his control.
So it was quite a shock to learn that Writers for Relief Vol. 3 had been released with my story in it. I gave Davey no small amount of (good-natured) grief but, in case you don’t know Davey, no one can stay mad at this guy for long. Davey Beauchamp is one of the many hidden treasures of the sf&f community. He’s a regular at Dragon*con and various parts of Virginia and a librarian, too!