My most "concrete" memory of this show was turning around during Character Zero and seeing the balcony bouncing up and down with a decidedly frightening cadence. Trey and Mike noticed as well, which I think explains the encore -- three songs, but all of them subdued. No more bouncing. As we walked up the aisle after the show, I spotted plaster on the floor that had fallen from the underside of the balcony. I am just happy to say that I did not attend "that concert where all those people died when the balcony collapsed."