I believe it was the one with Cryhavok where Cryhavok were supporting and played too long and so the hosue shut bodom off early and alexi inadvertantly started a riot.
The Cryhavoc thingie was another gig I think.. I guess you are referring to the Tavastia gig in 1997. COB got some sort of award and they had to play at the award ceremony or something like that and all the big guys from the record label etc were watching the show, so they really had to do a good gig. Unfortunately it was a fucking mess and they broke guitar strings etc and everything went straight to hell. I think Alexi said he wished that the gig would've been over already after the first song but it only got worse and worse..