 When Cunningham views the film, he sees that not only has he captured the blur, but that it is moving towards his son, and not away from him.From this, Cunningham concludes that the blur is not the soul but a force known in Greek mythology as an "asphyx", a kind of personal Grim Reaper from Greek mythology that comes for every individual at the moment of his or her death.While filming a public execution as a protest against capital punishment, Cunningham activates a spotlight that he has crafted using phosphorus stones beneath a drip irrigation valve.