From: Adam Sanderson <netghost@...>
Date: 2005-08-17T12:46:14+09:00
Subject: Re: NEWBIE QUESTION: pattern with nil

Don't worry, you can redefine it to return :mu
  http://en.wikipedia.org/wiki/Mu_%28Japanese_word%29
Or for added entertainment just return nil again.

Oh wait, you didn't want to confuse the rest of the world?
  .adam sanderson