We were at a Grimethorpe Colliery Band concert and there was a pianist accompanying one piece on a grand piano. The percussionist hit his bass drum so hard that the drumstick flew out of his hand, sailed through the air and landed on the strings inside the piano. A loud twanging sound ensued, the pianist jumped a mile and everyone cheered! The band were in stitches and there was a short interlude while they recovered their equilibrium! It was, though, a truly wonderful concert (they always are). On another occasion we were watching a performance of Aida, when Aida's father is brought onstage in chains and she embraces him. His chains somehow became entangled with her costume and they struggled frantically to free themselves, singing all the time!