When I was younger, my best friend's dad was a cop. I went to work with him on one of those Bring a Kid to Work days. When we were in his cruiser, he showed me a black and white photo of a decapitated head laying on the side of the road. He told me it was a guy who witnessed an accident and wouldn't get back in his car. Said he kept it in his cruiser to show the lookie-lous who didn't want to listen. I don't think I'll ever erase that image from my head. In this day and age, he'd probably need full colour high-def video with surround sound to have the same effect.