This film isn't really about anything.  You have no idea who the 5 victims are, you have no idea who the killers are, and you have no idea what the motivation is behind such disgusting, brutal slayings.  THE TEXAS CHAINSAW MASSACRE is just an violent, exhibitionist film that shows some really terrible, inexplicable ways to die.  That all being said...there is a raw fear that is inevitable while watching it.  Sure, Leatherface is a bit cheesy looking, and he runs with the chainsaw like a doofus, but when everything climaxes to that scene at the dinner table...I could feel the nightmares begin to conform inside my brain.  Nothing really to this movie, but the rattle of the chainsaw will bother you much more after experiencing this film.