Best: Probably about 1991 I think I saw a show called Clash of the Titans, Megadeth, Slayer, Anthrax, Alice in Chains. Had 5th row tickets, during Slayer the crew came out to remove the first 5 rows of seats to create a pit, my brother and I helped them out, after Slayer finished one of the crew guys came back out and gave us a bunch of Slayer guitar picks, drums sticks and such. That was kinda cool.
Worst: lolapalooza 93 Alice in Chains, primus, rage against the machine among others Tool on the small stage. The show itself was great.
I think the attendance was around 30,000 or so, During Alice in Chains I was near the front, probably 30 ft. away from the stage, an absolute sea of people, not really a pit just all crammed together, I happened to step just the wrong way......and had my knee go sideways! Obviously I went down, the guy next to me grabbed me right away to help me up, my knee popped back in....but the damage was done!