The anecdote is told here starting around 00:15:10 into the talk: (all of which is excellent) http://yow.eventer.com/events/1004/talks/1054 http://yow.eventer.

The anecdote is told here starting around 00:15:10 into the talk: (all of which is excellent) http://yow.eventer.com/events/1004/talks/1054 http://yow.eventer.com/events/1004/talks/1054