A young man talking on a cellphone meanders along the edge of a lonely train platform at night. Suddenly he stumbles, loses his balance and pitches over the side, landing head first on the tracks.
Fortunately there were no trains approaching the Philadelphia-area station at
that moment, because it took the man several minutes to recover enough to climb
out of danger. But the incident, captured last year by a security camera and
provided to The Associated Press, underscores the risks of what government
officials and safety experts say is a growing problem: distracted walking.