In this video, an unsupervised child walks around in public. The kid goes up to a parked truck where people are working. The child then decides to go directly stand in front of the truck where it's impossible for the driver to see. Later, the truck moves, the child tries to walk away but gets knocked down and crushed by the truck's wheels. People nearby immediately stop the truck in order to try to recover the crushed child.

Personal opinion, there were lots of people in that area. Nobody ever told the kid to quit standing in front of the truck. Even without a guardian around, the kid would not have been crushed if someone gave a damn about a lone kid messing around in the middle of the street.