Jack throws a yellow rubber ball against a representation of a Navajo SAND PAINTING. The sandpainting, usually made on the ground by a Medicine Man, acts as a portal to attract the spirits and allow them to come and go. Sitting on the sandpainting helps the patient to absorb spiritual power, while in turn the Holy People (portrayed in the sand painting) will absorb the illness and take it away. Afterward, when the sandpainting has done its duty, it is considered to be toxic, since it has absorbed the illness. For this reason, the painting is destroyed. Because so many outsiders are curious about sandpainting, some medicine men may create pieces for exhibition purposes only, using reversed colors and variations. To create an authentic sandpainting solely for viewing would be a profane act. The sandpaintings for sale in shops and on the Internet are commercially produced and contain purposeful errors, as the real sandpaintings are considered sacred or alive.