When I was in a ceilidh band at school, my French teacher played the concertina. He was sitting on top of an amp, playing merrily along. Behind the stage was a curtain, and he presumed there was a wall behind that.... he leant back against the "wall" and fell off the back of the stage and dropped his concertina underneath it. It was all we could do to finish the tune, cos we were in such hysterics.

You can bet that we never let him forget about it either!

Bagpuss