have you seen this?...
Hövding is a collar for bicyclists, worn around the neck. The collar
contains a folded up airbag that you'll only see if you have
The airbag is shaped like a hood, surrounding and protecting the
bicyclist's head. The trigger mechanism is controlled by sensors which
pick up the abnormal movements of a bicyclist in an accident...and so cool!
great short film to watch at http://www.youtube.com/watch?v=aQXRTDwfZzk