I was stopped for an accident on I70 E in St Louis County. While stopped a 2015 Mazda hit me in the rear. He hit me so hard that the the seat broke and I went all the way back to the back seat. He then pushed me into the stopped Tahoe in front of me. I went forward and hit the steering wheel. None of the airbags deployed. Component malfunction would be air bag system and seat. I feel that if I had one of my grand kids in the back they may have been crushed. As far as I know the problem has not been confirmed by anyone. The car was checked by insurance company and totaled. There were no warnings or warning lamps. I have pictures that can be emailed or texted, I can't get them in here.