When slogging through the trenches of exploitation, it's rewarding to come across a gem like this. The acting is top-notch, the story remains interesting thanks to several twists, and it stars Franco Nero. What more do you want?

Franco Nero and Corinne Clery play a European couple on a camping vacation in remote California, who make the mistake of picking up a hitch-hiking David Hess. He's an escaped psycho killer who takes them on a road trip to hell. Lots of corny dialog, but plenty of intense dramatic scenes with a clever and original score by Ennio Morricone, much better known for his western themes. Clery gets naked a bunch of times, too.