A father is driving his son to school.  A car swerves in front of them.  The father tries to move around the other vehicle, but he loses control and the car containing the father and son flips onto its side.  Both the father and son are injured and unconscious.

The son has sustained a head injury that requires immediate attention.  He is rushed to the nearest hospital and quickly prepped for surgery.  Several medical workers are already in place when the surgeon enters the room.  The surgeon takes one look at the boy on the table and says, “Oh my God.  I can’t operate on this child.  He’s my son.”

How can this be?