Halloween candy and parts of costumes strewn across the street is any parent's nightmare. And that was the scene in South Los Angeles Wednesday after a hit-and-run driver hit a mother trick-or-treating, CBS reports in the video above.Susan Washington, 46, was trick-or-treating with her 9-year-old son, Nathaniel, and his friend, Alvin Hardy, in Watts when a car sped around the corner.Read More... More on Video