I was hit in the back by an SUV (my speed=40 mph, the SUV's speed=70 mph). As a result of the impact, my prius flew off the road, hit the roadside railings, and then rolled over 4 times landing upside down. However, NONE of the airbags deployed. This includes the front, side, and curtain airbags. The vehicle was serviced at a Toyota dealership a few years ago where they performed the airbag recall. However, the airbags did not deploy at all. Only sheer luck saved me from death due to the airbag malfunction.