Oh boy, oh boy... How can a movie with such a good premise turn out to be so boring and flat? When I was reading the synopsis I thought this stuff was right up my alley. No, I was wrong. Hell, even Creep (2004) was better. This movie seriously didn't know what it wanted to be. Quite frankly, there was nothing scary about this picture. They showed all too much of the 'caveman' since he's the one we're supposed to be scared of. And when the scary guy has more screen time in a horror movie than our good guys, he doesn't invoke fear in us, because we learn to know him so well. There's nothing mysterious about him. Nothing to be afraid of. Sure there's some gore but that's not enough to make a horror movie. I've got another concern too. The music is a major problem here. There's nothing atmospheric about it and we notice it straight away as the credits roll. I think it's jazz or something but it really doesn't fit here. Music is such an important element when you're creating fear. Now there's something good in here too. And it's a comedic thing. Yes, this worked better as a comedy. Watching Donald Pleasence as the detective was a blast. Great fun. That's about all I've got to say. Oh, and although he wasn't very successful here, Gary Sherman is a capable director. I've witnessed it my self when I saw Dead&Buried. Go see that Instead of this messy 70's horror.