I think this story wins so far 😛
If the question was what left the biggest impression on me at a Bills game ... when I was maybe 9-10 yrs old I remember going to a game and as we filed out at the end, there was a guy almost passed out drunk sprawled with his legs over the bench in front and his arms sprawled out - sitting there with his unit hanging out, literally pissing all over himself. To this day I can still hear my dad's voice as he instructed me in a disappointed tone "Just move along son"