Sat through a two-hour meeting with kevin and frank talking about stuff I understood maybe 10% of. It felt like it completely epitomized my experience with grad school so far: feeling really stupid most of the time, but really satisfied when I understand some little thing.
Also I think I may have spontaaneously arrived at the solution of an old problem that's been nagging at me, while daydreaming for five minutes during the meeting. More on that later if it turns out to work.
The sight and sound of lots of undergrads running around and the smell of sun-baked grass and O fries is extremely comforting.