Angel City - Take a Long Line - 1980

I was there when an AC fan falls through the ceiling tiles; 2 had snuck into the colosseum earlier that day...as they opened a 10'x 10' panel wafted down and hit a couple concertogres in the chest a couple seats over and the perp landed on the front row crowd, injuring one.
I think they were the opener for The Kinks, but IDR Exactly... I was a wee wasted/