<P> With darkness falling, Sally and Franklin set out to find their friends . As they near the neighboring house and call out, Leatherface lunges from the darkness and kills Franklin with a chainsaw . Sally runs toward the house and finds the desiccated remains of an elderly couple in an upstairs room . She escapes from Leatherface by jumping through a second - floor window and flees to the gas station . Leatherface disappears into the night . The proprietor calms her with offers of help but then ties her up, gags her and forces her into his truck . He drives to the house, arriving at the same time as the hitchhiker, now revealed as Leatherface's brother . When the pair bring Sally inside, the hitchhiker recognizes her and taunts her . </P> <P> The men torment the bound and gagged Sally while Leatherface, now dressed as a woman, serves dinner . Leatherface and the hitchhiker bring Grandpa (John Dugan), one of the desiccated bodies seen earlier, down from upstairs . He is revealed to be alive when he sucks blood from a cut in Sally's finger . During the night, they decide that Grandpa, the best killer in the old slaughterhouse, should kill Sally . He tries to hit her with a hammer but is too weak . In the ensuing confusion, she breaks free, leaps through a window, and flees to the road . Leatherface and the hitchhiker give chase, but the latter is run over and killed by a passing semi-trailer truck . Armed with his chainsaw, Leatherface attacks the truck when the driver stops to help; the driver knocks down Leatherface with a pipe wrench, causing the chainsaw to cut his leg . The driver flees, and Sally escapes in the back of a passing pickup truck as Leatherface dances maniacally in the road with his chainsaw . </P> <P> The concept for The Texas Chain Saw Massacre arose in the early 1970s while Tobe Hooper was working as an assistant film director at the University of Texas at Austin and as a documentary cameraman . He had already developed a story involving the elements of isolation, the woods, and darkness . He credited the graphic coverage of violence by San Antonio news outlets as one inspiration for the film and based elements of the plot on serial killer Ed Gein in 1950s Wisconsin; Gein inspired other horror films such as Psycho (1960) and The Silence of the Lambs (1991). During development, Hooper used the working titles of Headcheese and Leatherface . </P> <P> Hooper has cited changes in the cultural and political landscape as central influences on the film . His intentional misinformation, that the "film you are about to see is true", was a response to being "lied to by the government about things that were going on all over the world", including Watergate, the 1973 oil crisis, and "the massacres and atrocities in the Vietnam War". The "lack of sentimentality and the brutality of things" that Hooper noticed while watching the local news, whose graphic coverage was epitomized by "showing brains spilled all over the road", led to his belief that "man was the real monster here, just wearing a different face, so I put a literal mask on the monster in my film". The idea of using a chainsaw as the murder weapon came to Hooper while he was in the hardware section of a busy store, contemplating how to speed his way through the crowd . </P>

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