Biking in an urban environment can be pretty dangerous, as drivers aren't always looking out for cyclists and people getting out of cabs are prone to opening their doors without checking to see if anyone is coming. While this Cervellum Hindsight won't save you from any poorly timed car door openings, it could keep you from merging into the path of a truck.

That's because it's basically a video rear view mirror for bikes. Featuring a camera that is mounted either on the handlebars or the seat post facing backwards and a handlebar-mounted screen that will show you what's going on behind you. It's more elaborate and I'm not sure how much more efficient than a mere mirror, but I suppose anything helps when it comes to safety.

Product Page, via Ubergizmo