I mean I recall that day. We had the entire end behind the goal, but I was sat side where the away fans go these days.
A few at the other side did it fairly early on, it provoked a home fan reaction all round and like you say it was "don't be fucking stupid doing that here"
Anyway cue 10 minutes to go the stupid element decided to give it another go. WTF.
I said to my mate this is going to be fun. Anyway we just happened to be next to a gangway so straight out on the whistle, but had said to my mate make sure nothing Wednesday related on display, coat fully zipped up, head down, just get to the road blend in and say fuck all. That bit worked, but could hear it all kicking off behind. The down side is we were on the ICO and last part fairly evident we were Wednesday fans. Coppers gave no shits whatsoever. So there was about 6 of us made it back, told the driver to shut the frigging doors. It felt like ages as the ruddy coaches came under attack. We were fortunate as they were parked 3 or 4 abreast and ours was on the inside. Still had at least one window go in and them trying to get in the emergency exit. Eventually the coppers decided they had best intervene and again an age later the rest of the Wednesday fans turned up. My one and only visit to Old Trafford - well I went to rugby league once