Which film is an allegorical nightmare about four city slickers on a weekend canoe trip?

The 1972 film "Deliverance" is an allegorical nightmare about four city slickers on a weekend canoe trip. The four city-dwelling friends (Jon Voight, Burt Reynolds, Ned Beatty, Ronny Cox) decide to get away from their jobs, wives, and kids for a week of canoeing in rural Georgia. When the men arrive, they are not welcomed by the backwoods locals. The locals in fact decide to stalk the vacationers and savagely attack them in the woods. Reeling from the ambush, the friends attempt to return home but are surrounded by dangerous rapids and pursued by a madman. Soon, their canoe trip turns into a fight for survival.

"Deliverance" is a popular American thriller. It was produced and directed by John Boorman. The film's screenplay was adapted by James Dickey from his 1970 novel, 'Deliverance'. The film was a critical success, earning three Oscar nominations and five Golden Globe Award nominations.

Widely acclaimed by critics as a landmark picture, this movie is noted for a music scene near the beginning, with one of the city men playing "Dueling Banjos" on guitar with a banjo-strumming country boy. Its visceral and notorious rape scene has also become well known. In 2008, "Deliverance" was selected for preservation in the United States National Film Registry by the Library of Congress as being "culturally, historically, or aesthetically significant".