We told you about the forthcoming PistolCam, mounted on a police officer's gun barrel and about to be adopted by a few cop shops across the violence-prone U.S., and here's a video showing you how it works. We grabbed a few clips and edited together this highlight reel of news-quacking anchors/anchorettes explaining the workings of these tattleCams. Nothing like some grainy video to keep those gun-totin' cowboy cops honest, is there? Check out the camera mounted on a Taser, too. [WREX]