A young man apparently playing "chicken" with an Amtrak train was killed instantly when the engine ran over his head, police said Saturday.

Shawn James Schultz, 21, of Escondido was with a group of friends Friday evening when he lay down on the tracks while the others watched, police said.Schultz apparently was playing "chicken" with the train, which was traveling at about 30 to 40 mph on its route from Los Angeles to San Diego, said Police Sgt. Richard Derouen.

The engineer did not realize the train had been in an accident and continued to San Diego, police said.