Getting in an accident when you go for a bike ride is not something you can predict. But it could happen to you. Not all accidents are serious. But it is always nice to have a way to get in touch with others when you are injured or stuck. The ICEdot Helmet Sensor could help. They attach to helmets and detect impact and sudden motion using built-in accelerometers. The ICEdot pairs with your smartphone over Bluetooth and sends SMS messages containing useful information about your accident and GPS co-ordinates. The ICEdot will be released next year for $200.