A video has emerged from the United States of a massive waterspout which formed off the coast of Florida.<br /><br />The impressive clip, which was filmed in Dunedin on August 18, shows the giant twister swirling close to the town.<br /><br />"I spotted the waterspout from miles away because it was so huge and ominous," the filmer wrote online.<br /><br />"When I arrived at the location it struck hardest, police were everywhere, trees down, firetrucks, building damage and a few unfortunate injured people including one child," the filmer added.