This four-minute YouTube clip of a 30-minute film made by Gwent police to illustrate the dangers of texting while driving has sparked global debate on the subject, and gathered more than six million views in a matter of weeks.
The film's writer and director, Peter Watkins-Hughes, put the clip on line to show a friend, but it was soon picked up by users stretching from South America to India. Fox TV in the US and the New York Times have even picked the story up.
It's a pretty gory affair, but check it out by clicking on the image below; we wouldn't recommend tucking into a three-course meal while you watch, however. The full film will be screened on BBC Wales this autumn.
The chief constable of Gwent Police, Mick Giannasi, says: "The messages contained in the film are as relevant to the people of Tennessee as they are to the residents of Tredegar," he said. "Texting and driving can have tragic consequences and the more this film is viewed, the better. Young people think they can text on auto-pilot because they do it so instinctively. For that reason we need to use strong imagery to get them to sit up and take notice."