There is a tragic story out of Virginia. Apparently a 15 year old was riding his bicycle when a car approached him from the rear.
According to published reports, the car mosed into the oncoming lane to pass the cyclist. The young boy, however, then turned left in front of the car.
According to accounts, the young cyclist was wearing headphones as the time of the accident. Unfortunately, he died from injuries sustained in the accident.
The obvious but sad lesson is that wearing headphones while bicycling (and, for that matter, while running near traffic) is a recipe for disaster.