none of these are the biggest in history for sure, but some of the most memorable in my experience...
the whole madison thing at DVC in '02 with the entrance was bad, we could see it all the way from the staging area. and the crowd was LAUGHING. it sucked because it was billed as "the first time madison had been west in how many years blah blah." i was talking to a snare player after the show and he said the whole show went south after that. there was some sort of other messup on the front sideline with a contra falling down and really bowing a formation because members were waiting for him to get up or something like that too.
in all the uniforms mentioned, i'm surprised nobody's pulled out a certain tour-de-france reject guard uniform recently donned by a certain all-male corp that's won quite a few championships recently. ouch.
the bd tenor player thing from last year was something to see, but since it was technically after the show was over, it's really not that big a deal. as i understand it, there was a level change there and well...he didn't.
while we're on BD tenor players, this one is hardly a big messup but in the "surprise" tag ending of BD's 2000 show, a certain unnamed tenor player whips out his sticks ON the horn trill, realizes he's early, and goes into "oh s***!" mode. that one cracks me up EVERY time.
i've only seen it on video, but the mandarins color guard wardrobe malfunction in my opinion is more a testament to the extreme devotion and concentration of the performers involved. a bunch of my friends were in the stands for that and they said people were ooh'ing and ahh'ing, taking pictures and video (my friends included), and she stood the there the whole time. now THAT is hardcore.