Catastrophic Bearing Failure

I had that happen on a class B no noise no change in driving, I was scanning mirrors and saw a barely recognizable amountof white smoke pulled over and It immediately had a flame shoot out. the previous owner or maybe the factory had sprayed some type of foam insulation on the frame as soon as that flame shot out and touched the foam the foam burned furiously as though you had light gasoline the fire spread instantly everywhere the foam was. Two highway patrolman were sitting where I pulled over neither had a fire extinggusher that hd not been already used. nothing was left except the frame and steel wheels and the propane tank.I managed to get my dog and wallet out with me. The wrecker driver that arrived with a rollback wrecker said he had never seen a vehicle burn so completely and all four wheels were warped from the fire. the engine had everything burned off the outside and the aluminum transmission was sagging. This occurred about a two weeks after nine eleven, and temporary rules were in effect where you could not rent a car in one state and drop the rental off in another state. We rented the smallest U-Haul truck we could in order to get us and our dog home. The Louisiana highway patrol was very helpful, they took us to a motel anthem a hour later came back and took us to supper, along with dropping off a bag of dog food and a bowl to put it in and a bowl for water for the dog. The next day they arrived and drove me to the U-Haul facility. That was also at a time when there were no body cameras or car cameras those two State Troopers helped us out of the goodness of their hearts.