great idea
This is a great idea, but would take a lot of time to develop the software and improve the accelerometer chips, then would need 1000's of people to record the movements so they can be identified. I defiantly think this could catch on, and be very useful, as if u had your phone with you and your car crashed it could already call 999 and give them details of rough position (or if gps is available), and depending on how hard it is, calculate wither u might need an ambulance. Again another useful thing is if someone falls over, especially the elderly, it could already call an ambulance if it detects no further movement afterwards.
Another great idea by Google