When Tim is teaching a group of college students, he starts by trying to teach them about the history of the engine of a car. Tim starts to explain a diagram of an engine that is on the board. The students find this to be boring, so one proceeds to hurl a spit wad at the board. Tim, trying to take this as a joke, says something about "a good spit to wad ratio there" but writes on the board "spit/was". When the camera shows the board again, it says "spit/wad".