I saw Queensryche during their Hear in the Now tour in Columbus Ohio. About 5 songs in Geoff Tate states that the concert is cancelled because he's having problems with his voice. Fans stick around for awhile thinking it's a joke, eventually they start leaving.
There is a giant inflated balloon shaped like a Budweiser can just outside the ampitheater, it was probably 20-30 feet tall. Fans are ticked, one guy has had too many and screams "You're going down!" Onlookers cheer as he sprints toward the can with his arms out and head back. He sinks into it about a foot before it flings him back and he lands flat on his back a few feet away.
He staggared away, seemed ok. I got a full refund for the ticket.