I don't think I need to bother describing this one. If you've never seen The Texas Chain Saw Massacre before, then I don't think you can be considered a fan of horror movies. Plus, the title says it all.
I got a free DVD of this at FYE this weekend because I spent more than $30 or something. Kind of fucked up that I didn't already own a copy, I guess, but it worked out for the best.