The first time I met David was at last year's Worldcon, in Spokane. We all laughed as I told him the story.
I was running the newsletter, and he stopped at the door.
"Come on in!" I said.
"Oh, no," said David, "If I come in there, you'll put me to work!"
"Muhahahaha! That's right! Come on in!"
"Well, I have prep work to do for the Hugo Ceremony."
"Oh my God, you're David Gerrold, aren't you!"
If you don't know who David is, he wrote the Tribble episode of the original Star Trek series, and he continues to write.