You left your child behind. A lot of people had to do this for reasons known. Many people who got out of line or were trying to help somebody else were usually killed for no reason at all. Helping your child back there would have been a death sentence. You walk the whole way there and find yourself and your children stuffed inside a train car with over 300 hundred people stuffed inside. You all have to stand inside the car and one of your children complain that they have been standing for two long. What do you tell your child to do?