Those Little Challenges We Face

Just got back from teaching my Physics 678 class. I can't really tell you the title, since I don't really know it myself. How so?, you ask....Well, what happened is this: The semester started, and I showed up to teach what I thought was supposed to be the second part of a graduate string theory class, as long promised. (The bit where I do my standard dog-and-pony show about D-branes, etc, now that they know about basic perturbative string theory from my colleague Nick Warner's class last year. Sort of an extended version of courses I've given at Summer Schools at several places around the planet.) The first warning sign was that I looked on the online schedule to see where my class was to be held (small classes often end up in surprise mystery buildings all over campus...I like this because I get to learn of new teaching spaces ...