I always wondered about the significance of the scene but never pursued it.
From Wiki: Christina's World is the most famous work by American painter Andrew Wyeth, and one of the best-known American paintings of the 20th century.
Painted in 1948, this tempera work is displayed at the Museum of Modern Art in New York.
It depicts Christina Olson, who had an undiagnosed muscular deterioration that paralyzed her lower body—likely Polio.
She was a strong and independent woman who did not let anything stop her from getting what and where she wanted.
She looks at her house, (implied line) dreading the crawl back but eager for the warmth it holds for her.
She, her brother, and Wyeth's neighbors are the subjects of a number of paintings of Wyeth.
Surprisingly, although Christina is the artistic subject of Wyeth's masterpiece, she was not the model - Wyeth's wife Betsy instead posed for the painting.
I have seen many reenactments of the scene on the photo site Flickr. Some are quite good.
Artist Andrew Wyeth, who portrayed the hidden melancholy of the people and landscapes of Pennsylvania's Brandywine Valley and coastal Maine in works such as "Christina's World," died early Friday. He was 91.
(so much like Cubbie our dog - stealing a snooze on the bed when no one is home)