Once upon a time, I worked as a writer. And I ran this thing called the Writers Roundtable. We met every two weeks to talk language and technology (we were, after all, Web writers). Anyhow, my former boss (the coolest authority figure ever) used to joke that he would do an interpretive dance to explain the subtleties of appropriate comma usage.
Rick still owes us that dance — perhaps he'll gather inspiration from Chris Bliss' interpretive juggling act?