I was talking with my wife last night about airbags. She's and RN and and has gone to some classes on airbag injuries. She was told in this class that an airbag can activate based soley on "rate of deceleration".... No impact, just a crictical rate at which the car slows down. I have always believed that an "impact" of some sort was required for the bags to deploy. That sensors in the car felt the impact and set off the deployment. My point was that if rate of decleration (alone) was now one of the technolgies in airbags deployment that you 'd have bags going off all the time in car tests, the track, at that last minute stop sign you just saw... Anyway, I know that there are a lot of new technologies out there... seat belts that sense declaration, etc. I was just wondering if anyone knew anything more about this subject?