DAMN YOU UNEMBEDDABLE YOUTUBE VIDOES.
Hanyway.
www.youtube.com/watch This. I was watching this and it ran through my mind: Why does this look so familiar?
I looked again. And it hit me. From 00:15 onwards, it looks exactly like what I look like when I try to do econs, particularly tricky annoying math problems or when a question in general happens to confound me too badly.