I have now proved to my own definitive satisfaction that I CANNOT make myself get up and do the run-yoga double on an empty stomach "first thing" in the morning. Lounged in bed a little longer, went to yoga (very good - essentially same class as yesterday, nice to get another go at it!), will run later. And have just registered for Bon's classes this week, not the Tuesday-Thursday morning one, in the interest of hewing better to my run schedule and getting some last bits of museum-going done.
1.5hr hot vinyasa!