Make LED wheels for your bike
After 22 steps, you'll be ready to show-off with your bike and new flashing wheels. At a certain speed, when the wheels are spinning fast enough, the flashing image will be clear for everyone to see, and applaud.
Read step by step instructions made by ladyada. at www.instructables.com, I must say that it doesn't look easy to do and you'll need some tools. It also looks like that you're not suppose to be a wild rider, or else your construction will fall apart.
Via Kotaku
