For the 2nd half we had moved over to the southwest corner to get some shade. There was 1 solitary dude sitting in Sec 232, Sec 231 was totally empty. Then 2 guys show up and start swinging their shirts around. Then 2 more, then 5-6 more. By then you could see more coming from all over the stadium, some walking and some at a full sprint (nearly as fast as our DBs). Age range was around 8 to 48, BAC range 0 to 2.2-ish. Eventually there were nearly 2.5 sections worth of shirtless going wild and dragging the rest of the 20,000 or so with them. Even had some semi-organized chants going, i.e. "refs you suck" and "take it off, " which I assumed was for the coeds walking by.
As hoopspride said above, I was expecting at least 2 full sections of shirtless for HC vs Cincy. Then I remembered all the frats and sororities will be jamming the student section, likely putting quite a damper on the shirtless.