Answer:
The whole movie is a reference to slavery, the cotton picking, as Chris is using cotton earplugs in the movie.
Explanation:
The whole movie is symbolic:
Red color is a symbol of blood, but as Chris doesn’t wear red, he is an outsider, but as red is also a symbol of danger, in the whole movie we can see red motives.
Auction is one of the most important motives in the movie, as the slaves were sold in auctions in the slavery period. In the movie, the picture is sold on auction.
The symbol is also a title of the movie, Get out; get out from everyone and everything, escape the danger.