Two days ago, I walked into my corporate class at a small investment bank. I was a little late after a harrowing experience in Saigon traffic on top of Bonushog, and came in sopping with terror-sweat. More than half of my class was absent, celebrating the birthdays of two of their colleagues, so we had a free-form discussion. At the end of class, I had one of my students take a picture of the whiteboard. I was pretty happy about the vocabulary they picked up that day.