I was once helping out on a RNLI stall which was situated next to a large temporary swimming pool where the local sub-aqua club were displaying their talents. Suddenly the plasic sides of the pool gave way and the water (which had to be delivered and taken away by about 4 large bowsers) was all around us. We ended up all in a display "Atlantic 21" inshore lifeboat, singing "Eternal Father Strong to Save" whilst waving RNLI flags. The public were highly amused, and there was a picture in the local paper.