One year, some of my high school chums and I went to see the Carnaval parade. We were standing here, watching a float go by. On the float, there were dancers. But then, suddenly, all the dancers were hopping off of the float, jogging along the street. And then the reason became clear: the float had separated from its towing vehicle's tow hitch, was rolling free. It rolled like an amiable juggernaut, slowed to a stop. There were no injuries that I recall, but some people had to get out of the way in a hurry.