That's really sad. About twelve years ago, a man my mother worked with was bike riding with his 9 year old son on a Sunday afternoon. They were riding in the city on the sidewalk. The father was leading and the son was only a few yards behind. Some idiot in a rented U-haul truck was leaning over to fool with the radio when he looked up in time to see that he was about to rearend a car that was slowing for a red light; he swerved to miss the car, jumped the curb and came to a stop on top of the boy on the bike. The boy did not make it.
Being the father of a nine year old myself, I can't imagine turning around to see that!