How does the railroad company try to prevent the men from boarding the train? Why is this unsuccessful? Hey is Bud unable to ran fast enough to Jump up on the train?

The railroad tries to keep people off the train by taking the train out early. In addition to this, private security officers are hired to guard the train and keep certain people off. There are, however, too many men trying to board the train than the security can handle. Bud is tired and can't seem to run fast enough to get on the train.