The Chief would take the Comanche tribe everyday to the baseball field or on adventures together, on a bus. The bus is where the Chief tells the boys stories about the Laughing man and is where the boys initially find out about Mary Hudson. The bus transports the kids and the chief into a different world and takes them to different adventures.
The baseball field is symbolic and reveals a lot about Mary Hudson's character. Mary stealing second and hating first base carries a sexual connotation and displays that she is used to getting what she wants without having to go through trials and having to put in effort. She also represents love and materialism which can corrupt and hurt people, like the Chief, causing them to lose their innocence. It also could represent her rushing through life and not enjoying every step, whereas the chief plays with kids and doesn't want to grow up so fast.
At the end of the laughing man, the Laughing Man died from being shot in the heart symbolic of the Chief being heartbroken by Mary Hudson. He also destroyed his relationship with Mary, just as the Laughing Man killed the Durfages. The Laughing Man lost his will to live, revealing the Chief's depression. This scene portrays the theme of loss and death versus the perceived immortality and invincibility of the Laughing Man. The Death of the Laughing Man is the end of the childish adventure story told by the chief, revealing to the kids and accepted by the Chief, that the loss of innocence, growing up, and death, are inevitable.