Well, it's pretty much an oral tradition. Steven was just referring to it.

There's also the thing we got from him, which I think he got from somebody else, but anyway, it came up when we were all gaming. Mike (John M. Ford) was gamesmaster, and he said to the party, "OK, what are you each doing?" And Steve said immediately and quite briskly, "I am ready to ride at a moment's notice, actively attempting not to be surprised."

Which also became a quote we all did in chorus.