protype helmet warns riders of speed bumps

An MIT professor has designed a "smart helmet" with a built-in computer controlled by movements of the head. It has blinkers, a phone jack, headphones, and a recording function hooked to a gps. Riders can shake their head to start the recorder, then record a message ("pothole" and "angry doberman" or "Taco Bell.") that will play at that spot next time they pass. What happens when you take it on a rough singletrack trail where your head is bouncing around everywhere? Maybe this.