2008 Prius Dies in a Fire

We ran over a child's mattress which had been dropped on the road. We were in heavy 65mph traffic and could not swerve. The springs snagged the undercarriage of our Prius. We immediately pulled over, but the fire was leaping up around us as we exited. I assume the catalytic converter or sparks from the springs started the fire. People stopped to help, some even had fire extinguishers, but things happened too fast. Traffic backed up for miles. When the fire department got there it was too late. The front engine compartment seemed to be unscathed but everything else was a wreck. My wife and I were safe. I took the pictures.