Vrooom! is the story of drag racing -- one of America's most popular spectator sports . Made with the cooperation of the National Hot Rod Association, the film is a fascinating historical document covering roughly the first 20 years of the sport's history, from the earliest days of 1950s street hot-rodders to the more sophisticated machines of the early 1970s. The film is an intricate mosaic of interviews with the people who build and race the cars and those who go to watch them, with sequences that show the ethereal power of these early machines in slow motion and from the point of view of the racers themselves.