Stuck in the snow a few years ago, the pax have been on board for hours, the airport is shut and the buses can't remove them as the aprons are snow covered. Everyone getting a little tetchy, when a Dutch lady elects to use the forward loo. She emerges within seconds and announces at the top of her voice to the whole cabin, "There ish a very big !!!! in there." Lightened the atmosphere for a while.