Fans can become heavily invested in their teams and that definitely seems to be the case with this guy. He got so worked up about the upset win over Georgia that he started shedding tears for the 38-31 win.
I get that sports mean a lot to some people, but it's not like this win was to get into the SEC championship game or even to get into a bowl game. This got the Vols back to .500 and a win over the Dawgs for the first time in five years. But apparently that's all it takes to induce some tears.