The instruction "Recycle!" would be shouted out mid-4th quarter, and all of the wine and beer bottles would be passed down. There was about one wine bottle per person in the whole section. Amazing amount of drinking. I remember guys getting pony kegs into games. Those were fun games. Somebody brought a keg to the Navy game my freshman year. We won, 52-0. It seemed like such a good idea, somebody did it again for Purdue. We won, 51-0.
btw, the marshmallows and TP were what really pissed off Bo. He hated that stuff. And I think Bo asked Don Canham to really crack down on letting people in with stuff to throw. And that was what led to a bigger crackdown on stuff brought in to drink.
The bit about slamming the opposing mascot into the goalposts; about 90% of the time it was staged, and the mascots cooperated. Otherwise, it is, uh, sort of an assault and battery.
By far, one of the greatest off-field spectacles in the modern history of Michigan Stadium was when, in the middle of a horrific pummeling of Norhtwestern, our cheerleaders (all men, gymnasts and divers, mostly, and incredibly talented at doing flips and tumbling and trampoline stunts and stuff NO cheerleaders do now) did the usual schtick of running the Wildcat mascot into the South goalposts. Whereupon our guys would usually run back to the student section, waving triumphantly at having posted the opposing mascot. But the Wildcat got up, and in the only known display of public sadomasochism I can think of at Michigan Stadium, he waved the Michigan cheerleaders back, and had them ram him again. Then, after that, one more time. The whole Stadium just went crazy. One of the funniest things I've ever seen there.