Palin's heckling mix-up
US Republican vice-presidential candidate Sarah Palin has mistaken some of her own fans for hecklers.
As a crowd of at least 20,000 gathered at Richmond International Raceway, Virginia, scores of people furthest from the stage could not hear her.
"Louder! Louder!" they chanted, having already waited three hours for Ms Palin. But she thought they were protesters and began to berate them.