Trivia: At the very end of the movie when the new kids are telling the story, they make a sarcastic comment about the killer being the girl from the Noxzema commercials. The girl who played the killer, Rebecca Gayheart, really was the girl from the Noxzema commercials.
Trivia: In the scene where Natalie and Damon drive off to the woods, when the car starts the song that plays for a second before Damon turns it off is the theme song from Dawson's Creek, which Joshua Jackson, who plays Damon, stars in.
Trivia: The gas attendant with the stutter at the very beginning of the movie is played by Brad Dourif, who plays serial killer Charles Lee Ray, more popularly known as Chucky, in the Child's Play movies.
Answer: This urban legend involves wannabe gang-bangers being required to make a kill to join the gang. In this scenario they drive with their headlights off and kill the driver of the first car that flashes their headlights at them. This was proved to be a false urban legend by snopes.com where more information can be found at http://www.snopes.com/horrors/madmen/lightsout.asp.
OneHappyHusky