Ever wish you could ride a motorcycle across Europe, take a train through Mongolia, or swim with sharks off South Africa? Then listen up: Diesel is launching their "Be Stupid" photo contest today, giving people all over the US an opportunity to win just such a once-in-a-lifetime adventure. To start, drop into one of the 31 participating Diesel stores over the next 4 weeks and grab a "Be Stupid" sticker. Then, using your camera phone or digital camera, take a photo of yourself with the sticker slapped on your forehead and e-mail it to Diesel. They'll ask you to share your most inspiring stupid story, and you'll be entered into the contest! Photos will appear on Diesel.com where visitors will be able to vote on entries. Each week, the contestant with the most votes will win an Apple iPad, Polaroid Pogo and a Flip video camera. Even better, at the end of the contest, the four weekly winners will be entered into a final face-off to decide the Grand Prize winner, who chooses one of 5 amazing adventure-trips. So, get thee to your nearest Diesel—it's the smart thing to do!